Research Article | Open Access
Beliefs, Barriers, and Preferences of European Overweight Women to Adopt a Healthier Lifestyle in Pregnancy to Minimize Risk of Developing Gestational Diabetes Mellitus: An Explorative Study
Introduction. We explored beliefs, perceived barriers, and preferences regarding lifestyle changes among overweight European pregnant women to help inform the development of future lifestyle interventions in the prevention of gestational diabetes mellitus. Methods. An explorative mixed methods, two-staged study was conducted to gather information from pregnant European women (BMI 25 kg/m2). In three European countries 21 interviews were conducted, followed by 71 questionnaires in six other European countries. Content analysis and descriptive and chi-square statistics were applied (). Results. Women preferred to obtain detailed information about their personal risk. The health of their baby was a major motivating factor. Perceived barriers for physical activity included pregnancy-specific issues such as tiredness and experiencing physical complaints. Insufficient time was a barrier more frequently reported by women with children. Abstaining from snacking was identified as a challenge for the majority of women, especially for those without children. Women preferred to obtain support from their partner, as well as health professionals and valued flexible lifestyle programs. Conclusions. Healthcare professionals need to inform overweight pregnant women about their personal risk, discuss lifestyle modification, and assist in weight management. Lifestyle programs should be tailored to the individual, taking into account barriers experienced by overweight first-time mothers and multipara women.
Gestational diabetes mellitus (GDM), which is defined as “carbohydrate intolerance resulting in hyperglycaemia of variable severity with onset or first recognition during pregnancy” , is a serious condition affecting 2–6% of pregnancies in Europe . It adversely affects health outcomes for both mother and child in pregnancy and in their future health [3–6], with a sevenfold increased risk for the mother [7, 8] and eightfold increased risk for the offspring  of developing type 2 diabetes mellitus.
High maternal weight is associated with a substantially higher risk of GDM  and the prevalence for GDM continues to increase with the worldwide rise of obesity . This suggests that prevention of GDM especially in the obese population is extremely important for both mother and child.
Current preventive strategies have mainly focussed on increasing physical activity and improving healthy eating . Despite a trend towards a reduced prevalence of GDM in overweight or obese women [13, 14], there is an urgent need for more well-designed effective lifestyle interventions for the prevention of GDM.
Adopting a healthy lifestyle may be particularly demanding for overweight or obese pregnant women as they are more likely to be less physically fit and have poorer quality diets [15, 16]. Still pregnancy seems a perfect time to intervene and discuss weight management, since women accept their weight and weight gain more than when they are not pregnant . Understanding the beliefs, barriers, and preferences of overweight pregnant women is key for developing effective lifestyle modification programs, but research in Europe is scarce.
Weir and colleagues  have conducted an interview study in the United Kingdom (UK), in which they found that healthy eating was often viewed as being of greater importance for the health of mother and baby than participation in physical activity. Also, participants often described how they would wait until the postnatal period to try and lose weight. A wide range of barriers to physical activity during pregnancy were highlighted including both internal (physical and psychological) and external barriers (work, family, time, and environmental). The study participants also lacked access to consistent information, advice, and support on the benefits of physical activity during pregnancy.
As part of a larger European project, we set out to enhance our understanding of beliefs, barriers, and preferences of European overweight and obese pregnant women regarding lifestyle modification in view of prevention of GDM.
2.1. Study Design
The study was designed as an exploratory two-staged project, applying mixed methods to inform directly the development of a European lifestyle program (Vitamin D and Lifestyle Intervention: DALI project ), which will target prevention of GDM in an overweight and obese population. The DALI study is conducted in nine European countries: Austria, Belgium, Denmark, Ireland, Italy, Netherlands, Poland, Spain, and the UK. This study set out to develop and test a suitable lifestyle program across all these countries, since except the UK  there are no data regarding preferences, beliefs, and barriers of lifestyle modification. Language difficulties required a pragmatic approach. Therefore the choice was made to start with qualitative interviews in Netherlands and Belgium, conducted by a Dutch speaking person (KvL) educated in health science. Secondly, and based on the interview results, a cross-national questionnaire was performed with overweight and obese pregnant women from six European countries (Austria, Denmark, Ireland, Italy, Poland, and Spain). In the UK, instead of this questionnaire, five more interviews were held, which were based on the questionnaire and the topic guide previously used in Netherlands and Belgium. These interviews were conducted by an English-speaking person (CB).
The study was guided by the Health Action Process Approach (HAPA) model of behaviour change, which builds on social-cognitive theory to help predict (preventive) health behaviour change of individuals at risk , and the Motivational Interviewing (MI) framework, which is a collaborative, person-centered form of guiding to elicit and strengthen motivation for change . Special focus is given to (i) risk perception and perceived importance, (ii) barriers and perceived self-efficacy, and (iii) preferences with regard to support in lifestyle modification.
The Institutional Review Board of the VU Medical Center and local ethical committees from the respective centers in the nine countries approved the study (NRES Committee East of England-Norfolk: 11/EE/0221; Medical University of Poznan: 1165/12; UZ KU Leuven: ML7625; VUmc Amsterdam: 2012/400; Hospital de la Santa Creu i Sant Pau, Barcelona, 13/006 (OBS); Medical University of Vienna: 2022/2012 – 1369/2013; Region Hovedstaden Copenhagen: H-4-2013-005; Province of Padua: 4201 × 11; Galway University Hospitals: 7/12).
2.2. Study Participants and Recruitment
In both phases of the study women with a prepregnancy body mass index (BMI) ≥ 25 kg/m2, which is a risk factor for the development of GDM , were randomly sampled. Women either were pregnant or had given birth within the last 12 months. Those that already had given birth were asked about the time while being pregnant, which provided additional data on received information and care around weight management as part of pregnancy care.
For the interviews, women were identified from those attending obstetric services for pregnancy in Amsterdam, Zwolle, or Enschede, Netherlands; Leuven, Belgium; Cambridge, UK. In Belgium and the UK women were recruited by their healthcare professional. In Netherlands women who previously were approached to participate in a lifestyle intervention program  were invited. Of the women included from Netherlands, five had actually experienced this lifestyle intervention program and five had previously declined participation. The women who were unable to come to the research center or hospital were interviewed by telephone. In Netherlands and in Belgium 53 women were approached to take part in the current study, and all those who replied positively have been included. We have no data on reasons for lack of willingness to participate. No data exists either on the total number of women invited in the UK.
For the questionnaire, women were identified in the participating obstetric services for pregnancy in Vienna, Austria; Copenhagen, Denmark; Galway, Ireland; Pisa or Padua, Italy; Poznan, Poland; and Barcelona, Spain. In all these countries women were recruited by their healthcare professional. No information exists on the total number of women invited in the different countries.
2.3. Data Collection
2.3.1. Phase 1: Semistructured Interview Procedure
A thematic interview guide with predefined questions was used, while giving the participants the freedom to elaborate on a particular subject. Included questions were based on the particular objective of this study and findings from previous studies [16, 18, 24–27]. The interview started with introductory questions concerning the women’s experiences with pregnancy and the importance of a healthy lifestyle. Next their beliefs, experiences, perceived barriers, and facilitators regarding a healthy diet and physical activity were investigated, followed by questions about preferred types of support, activities, and mode of delivery of an intervention. A pilot-test of the interview guide was carried out with one pregnant woman (not included in the study), which resulted in minor changes in the wording. The interviews comprised 15 face-to-face interviews and six telephone interviews and lasted between 15 minutes and 120 minutes and were voice-recorded and transcribed verbatim. The interviews were performed by KvL (Netherlands and Belgium) in the period of January 2010–April 2010 and CB (UK) in the period of November 2011–April 2012. After 16 interviews theme saturation was achieved and confirmed with the five final interviews conducted in the UK.
2.3.2. Phase 2: Questionnaire Procedure
In phase two, the topics from the interviews were rewritten as statements in a questionnaire, with response categories on a 5-point Likert scale (strongly agree, agree, neutral, disagree, and strongly disagree) and with space for open ended comments. The questionnaire contained closed and open ended questions in English and was sent to participating obstetricians, midwives, and physicians in Austria, Denmark, Ireland, Italy, Poland, and Spain to gather information from those other European countries. Pregnant women completed the questionnaire in their native language together with their midwife/obstetrician/physician during a consultation, except for Spain where the questions were answered by telephone. Both face-to-face and telephone conversations were audio recorded and the comment responses and open questions were back-translated by the midwife/obstetrician/physician into the English language and sent to Netherlands for analyses. In total 71 questionnaires were completed in the period of July–December 2010.
2.4. Data Analysis
The transcripts of the interviews were coded by KvL and analysed according to the framework method of qualitative data analysis  using software package AtlasTi 5. The coding for three interviews was independently reviewed by a second researcher (NO), showing high agreement. A few disagreements were resolved by discussion.
All questionnaire data were entered in SPSS (v15.0) (SPSS Inc., Illinois, USA). The answer categories for “strongly agree” and “agree” were combined (referred to as agreed), as well as “strongly disagree” and “disagree” (referred to as disagreed). Descriptive statistics (frequencies and percentages) were used to summarize quantitative data. Chi square statistics were used to explore associations between answers and respondent characteristics. The level of statistical significance was set at .
The majority of the women involved in the interview part of the study had a high level of education and had a European background (Table 1). Fifteen women were interviewed throughout pregnancy (between 16 and 39 weeks of gestational age) and six women were interviewed between 0 and 12 months after delivery. In the questionnaire part of the study women tended to be more equally divided across age and educational level. Sixty-six women were between 6 and 40 weeks of gestational age and five women were between 3 and 4 months postpartum. In both groups about 60% of all the women had another child at home.
The learning from this study, combining interview and questionnaire data, is grouped in three categories, with reference to the HAPA model  and MI framework : (i) risk perception and perceived importance, (ii) barriers and self-efficacy, and (iii) preferences with regard to a lifestyle program aimed at assisting in improving physical activity and eating habits in order to manage gestational weight gain. The main results are presented in Table 2.
|DM refers to diabetes mellitus; GDM refers to gestational diabetes mellitus.|
DM/problems refers to no family history of DM or problems with DM.
3.1. Risk Perception and Perceived Importance
The most important motivator for a healthy lifestyle was the health of their babies (100%; see Table 2).
The health of your child is most important, that’s my top concern. Of course, my own health as well, but I have my child more often in my mind than myself. (#8, 19 weeks pregnant woman with 2nd child, Netherlands)
In this study 62% of the women indicated that nobody had ever talked to them about the risks and consequences of GDM (Table 2). Although all of the women were overweight or even obese, only 57% thought they had a high risk of actually developing GDM (Table 2). Some women acknowledged that they would be more proactive in maintaining a healthy lifestyle if caregivers would emphasize the importance of doing so, for instance, by paying attention to their higher risk for diseases and complications caused by their weight.
There is little time to talk about these things. I was told ‘there is a higher risk for you to develop diabetes’ […], but you have to search for information yourself. Nobody ever mentioned to me what it means to have diabetes or gestational diabetes. I think that would help, so that you really grasp the consequences. (#4, delivered 3rd child, Netherlands)
I noticed that care providers hardly ever bring up weight issues. I think it is important that general practitioners and midwives give us more guidance in controlling our weight. (#3, delivered 1st child, 4 months postpartum, Netherlands)
3.2. Barriers and Perceived Self-Efficacy
Barriers for women to be physically active during pregnancy may be internal and/or external. Two internal barriers brought forward by our interviewed women and quantitatively scored by those who filled out the questionnaire were experiencing physical complaints (80%) and tiredness (46%) (Table 2).
In the beginning you are tired, a lot. Just not enough energy …, you come back from work, but are too tired to go out again. (#13, delivered 1st child, 2 months postpartum, Belgium)
Not having sufficient time (34%) was reported as external barrier (Table 2). Those women with children were more likely to agree that they had too little time to be physically active (47%) compared to nulliparous women (14%) ().
Before my first pregnancy I used to exercise a lot. Then I got pregnant again for a second time real soon and had no time anymore. ‘…’ My physical activity is walking at home, the stairs and running after the children. (#15, 16 weeks pregnant woman with 3rd child, Belgium)
Almost all women (92%) were motivated because they felt better after completing any physical activity (Table 2). In addition, the interviewed women indicated that regular engaging in physical activity with friends or others during their pregnancy supported them in being active.
The interviewees tended not to differentiate between a healthy diet in general and during pregnancy, but they did mention the importance of meeting their unborn child’s nutritional needs and the foods that should be avoided during pregnancy, such as soft cheeses and raw meat.
Ever since I have been pregnant I have made a very very conscious effort to make sure I was doing the right things and eating the right things, because obviously, I’m trying to grow someone (laughs). (#19, 35 weeks pregnant woman with 2nd child, UK)
Women with children found it less difficult to maintain a healthy diet throughout pregnancy (30%), compared to women without children (64%) (). Other frequently experienced barriers to eating healthily mentioned by the interviewed women were having cravings, social gatherings, and being busy.
Being an example is motivating. It is impossible to take candy and tell your children they can’t have it. […] If you do not want your child to drink cola, then you should not be doing it yourself. (#11, 35 weeks pregnant woman with 2nd child, Belgium)
3.3. Preferences for a Lifestyle Program
A program addressing both healthy eating and physical activity was preferred by the women, in which personal risks, consequences, and emotional issues relating to weight and GDM should be addressed.
Forcing things down people’s throats I believe is not the way to go, so actually having someone say do you think this might be the best option, to try to encourage you to choose for yourself, but not forcing it down your neck is a good way of people trying to communicate with you to eat healthily. (#17, pregnant with 6th child, UK)
Women would like to talk to a health provider, coach, or dietician (86%) and were motivated if another person checked their diet and weight regularly (76%; see Table 2).
All women were generally in favour of being offered multiple choices in terms of time, location (at home or in a hospital), communication channels (face-to-face, telephone, and/or Internet (see Table 2)), and activities (swimming, walking, group fitness/exercises, and cycling).
I don’t know because some people work better in groups some people do not, I am more on my own kind of thing, because sometimes it might get a bit too much, so it depends on the person. I would probably be like one on one. (#21, pregnant with 2nd child, UK)
The support of the partner is seen as extremely important (91%; see Table 2), underscoring the need to include the partner in the process of behaviour change in pregnant women.
We explored beliefs, experiences, and preferences regarding lifestyle modification during pregnancy among a diverse sample of overweight and obese European women who are at increased risk of developing GDM. The interviews in Belgium, Netherlands, and the UK provided an in-depth analysis and richness on risk perception of GDM, barriers, and facilitators regarding the topics physical activity, healthy eating, and weight control. The questionnaire results across other European countries corroborated our findings from the interviews, providing valuable information on the best European approach to intervene in the lives of overweight and obese pregnant women.
To make changes to ones’ behaviour a person should first perceive a necessity to change . Perceived importance of behaviour change is one of the determinants of motivation and strongly driven by risk perception . This may pertain to the woman’s own health as well as the health of the unborn baby. All women in our study valued the importance of the health of their unborn child, which is not a unique finding but definitely underscoring the observation that pregnancy is a key time in which women are motivated to live healthily .
Consistent with earlier research, in our study pregnant women appear highly receptive to health information and advice during pregnancy . However, professionals do not use this opportunity to discuss the accompanying risk of obesity in pregnancy as they experience it to be a “conversation stopper” . Furthermore, professionals report they do not want to offend their clients by addressing their obesity and the risks involved [32, 33], which could potentially impact negatively on the midwife-woman relationship . Based on an in-depth interview study in obese pregnant women, a clear need exists for training of professionals in nonjudgemental weight counselling and motivational techniques . The need for this motivational training is supported by the observational study of Brown et al. collecting all the verbal and written information provided to first-time pregnant women regarding physical activity, diet, and weight management, which lacked purpose goals within verbal instructions, performance feedback, and specificity and relevance of target goals .
The barriers related to physical activity like physical complaints, tiredness, and time mentioned by the women in this study were mentioned by normal weight European pregnant women in previous conducted studies as well [18, 36–39], suggesting that these barriers may apply to the whole pregnant population. So far, studies on the relationship between BMI and exercise during pregnancy are inconclusive , although it would be of interest to see if physical complaints differ in magnitude and severity between a normal weight and overweight population.
In our study women who had at least one other child indicated that time constraints made it harder for them to be physically active, which is consistent with other studies in which first-time pregnant women were 1.6–1.9 times more likely to be physically active compared to multipara women . Providing childcare or home-based interventions may prove helpful in this context.
Pregnancy often results in a decline in physical activity levels , as reported by the participants in our study. American guidelines suggest that pregnant women who are sedentary prior to pregnancy should build up their activity level to at least 30 minutes of at least moderate activity a day, while already active women should maintain or increase their level up to 30–60 minutes a day . However, prescribing physical activity will only translate into behavioural change if the person is motivated and confident of her own ability to actually make that behavioural change. Self-efficacy is highly related to intention formation , weighing the pros and cons of a specific behavioural change. It is found that higher levels of self-efficacy to exercise and to overcome exercise barriers are associated with more leisure time physical activity during pregnancy . Promoting pregnant women’s self-efficacy by health counselling is therefore key.
There are many benefits from being more physically active for both maternal and foetal health . Yet, these benefits have not been reported by the women in this study, which suggests a need for an improvement in the quantity and quality of information related to physical activity presented by healthcare professionals .
This research indicates on the one hand difficulties for women with children to become physically active, yet on the other hand they experience fewer problems to eating a healthy diet. Eating healthier may be due to their wish to set an example for their children or they may be more knowledgeable regarding healthy food from a previous pregnancy. In intervention development it may be especially valuable to distinguish between first-time mothers and those women who already have children.
Based on the results from this study an intervention program across Europe should primarily be flexible to attend and individually tailored to a woman’s personal lifestyle, addressing topics related to weight management, physical activity, and healthy eating. The partner is seen as highly important by almost all women, which is concurrent with earlier research [18, 26, 36]. In addition to partner support, this research suggests that it may be important to extend interventions to family and friends since they might discourage these women from being more active especially in third trimester of pregnancy .
5. Strengths and Limitations
This mixed method study was conducted in a heterogeneous group of overweight and obese women, making it possible to investigate the views of women living in nine different countries across Europe. This favours the external validity. However, selection bias cannot be excluded, as we have no information available on the nonresponders. There were clear trends and answers were rather comparable across sites, with no obvious differences observed between countries. This would justify the implementation of a similar intervention strategy across these countries. However, we should interpret our findings with caution given the small sample size of this study, which made it impossible to conduct separate analysis by “country.” We further recognize that women’s responses might have been different for those “being overweight or obese” or those “currently pregnant or postpartum” women. Additionally the type of experienced barriers across pregnancy may have been dynamic as was found in earlier research , although it was not our intention to investigate this, since we wanted to develop an intervention to intervene across the whole pregnancy. Also the data gathering either by telephone call or by face-to-face interview might have had an impact on the results, although we believe that this pragmatic approach led to the inclusion of women who would otherwise not have participated due to time constraints and therefore we see this as a valuable addition to the data collection process. Translation of questions into different European languages and back might have influenced our results, although we found striking consistency in responses across countries. Furthermore, it is a limitation that detailed information regarding the response rate is lacking in most of the countries.
From our results it would appear that overweight and obese pregnant women overall are motivated to adopt a healthy lifestyle, but we cannot assume all overweight and obese pregnant women have that “readiness to change” . Raising and reinforcing risk awareness combined with promoting self-efficacy warranted special attention, with a prominent role for health professionals . A tailored counselling intervention attuned to the stage of behaviour change  and taking into account barriers related to parity might be beneficial. In the end, this study led to the development of the DALI intervention program, in which lifestyle coaches in addition to the usual care women receive will provide risk communication and individual lifestyle counselling on lifestyle behaviours such as weight management, physical activity, and healthy eating. A detailed description of the developed intervention is written elsewhere . Further research will demonstrate if addressing the issues that emerged from this study can help European overweight and obese women successfully prevent GDM.
|BMI:||Body mass index|
|GDM:||Gestational diabetes mellitus|
|HAPA:||Health Action Process Approach|
We confirm all patient/personal identifiers have been removed or disguised so the patient/person(s) described are not identifiable and cannot be identified through the details of the story.
Conflict of Interests
The authors declare that there is no conflict of interests regarding the publication of this paper.
Judith G. M. Jelsma contributed to the analysis of the questionnaire and writing of the paper and took the lead in redrafting the script following editorial review. Karen M. van Leeuwen contributed to the conception and design of the study and undertook the interviews in Netherlands and Belgium and wrote the first draft of the paper. Nicolette Oostdam contributed to the conception and design of the study and data analysis. Christopher Bunn and David Simmons contributed to the data collection of the interviews in the UK. Rosa Corcoy and Juan M. Adelantado contributed to the data collection in Spain. Jürgen Harreiter and Alexandra Kautzky-Willer contributed to the data collection in Austria. Frans Andre van Assche, Roland Devlieger, and Dirk Timmerman contributed to the data collection in Belgium. Peter Damm and Elisabeth R. Mathiesen contributed to the data collection in Denmark. Ewa Wender-Ozegowska and Agnieszka Zawiejska contributed to the data collection in Poland. Annunziata Lapolla, Stefano del Prato, Alessandra Bertolotto, and Maria G. Dalfrà contributed to the data collection in Italy. Fidelma Dunne contributed to the data collection in Ireland. Frank J. Snoek and Mireille N. M. van Poppel contributed to the conception and design of the study and reviewed the paper. David Simmons, Gernot Desoye, Rosa Corcoy, Alexandra Kautzky-Willer, David Hill, Elisabeth R. Mathiesen, Peter Damm, Pablo Rebollo, Annunziata Lapolla, Fidelma Dunne, Dorte M. Jensen, and Lise Lotte T. Andersen have made substantial revision to the draft paper. All of the authors have read and approved the final paper. Judith G. M. Jelsma and Karen M. van Leeuwen contributed equally to the paper.
The research leading to these results has received funding from the European Community’s 7th Framework Programme (FP7/2007–2013) under Grant Agreement no. 242187 and from Netherlands Organization for Health Research and Development (ZonMw), Grant no. 200310013. The authors are deeply grateful to the participants who shared their experiences and ideas about prevention of GDM and they would like to thank the researchers/obstetricians/midwifes/physicians involved in collecting data from the participants.
- World Health Organization and Department of Non-Communicable Disease Surveillance, Definition, Diagnosis and Classification of Diabetes Mellitus and Its Complications. Part 1, World Health Organization, Geneva, Switzerland, 1999.
- B. S. Buckley, J. Harreiter, P. Damm et al., “Gestational diabetes mellitus in Europe: prevalence, current screening practice and barriers to screening. A review,” Diabetic Medicine, vol. 29, no. 7, pp. 844–854, 2012.
- N. Khatun, S. A. Latif, and M. M. Uddin, “Infant outcomes of gestational diabetes mellitus,” Mymensingh Medical Journal, vol. 14, no. 1, pp. 29–31, 2005.
- B. E. Metzger, “Long-term outcomes in mothers diagnosed with gestational diabetes mellitus and their offspring,” Clinical Obstetrics and Gynecology, vol. 50, no. 4, pp. 972–979, 2007.
- A. Lapolla, M. G. Dalfrà, M. Bonomo et al., “Gestational diabetes mellitus in Italy: a multicenter study,” European Journal of Obstetrics Gynecology and Reproductive Biology, vol. 145, no. 2, pp. 149–153, 2009.
- D. R. Coustan, L. P. Lowe, B. E. Metzger, and A. R. Dyer, “The Hyperglycemia and Adverse Pregnancy Outcome (HAPO) Sudy: paving the way for new diagnostic criteria for gestational diabetes mellitus,” American Journal of Obstetrics and Gynecology, vol. 202, no. 6, pp. 654.e1–654.e6, 2010.
- L. Bellamy, J.-P. Casas, A. D. Hingorani, and D. Williams, “Type 2 diabetes mellitus after gestational diabetes: a systematic review and meta-analysis,” The Lancet, vol. 373, no. 9677, pp. 1773–1779, 2009.
- J. Pirkola, A. Pouta, A. Bloigu et al., “Prepregnancy overweight and gestational diabetes as determinants of subsequent diabetes and hypertension after 20-year follow-up,” The Journal of Clinical Endocrinology and Metabolism, vol. 95, no. 2, pp. 772–778, 2010.
- T. D. Clausen, E. R. Mathiesen, T. Hansen et al., “High prevalence of type 2 diabetes and pre-diabetes in adult offspring of women with gestational diabetes mellitus or type 1 diabetes: the role of intrauterine hyperglycemia,” Diabetes Care, vol. 31, no. 2, pp. 340–346, 2008.
- S. Y. Chu, W. M. Callaghan, S. Y. Kim et al., “Maternal obesity and risk of gestational diabetes mellitus,” Diabetes Care, vol. 30, no. 8, pp. 2070–2076, 2007.
- K. J. Hunt and K. L. Schuller, “The increasing prevalence of diabetes in pregnancy,” Obstetrics and Gynecology Clinics of North America, vol. 34, no. 2, pp. 173–199, 2007.
- J. F. Clapp III, “Effects of diet and exercise on insulin resistance during pregnancy,” Metabolic Syndrome and Related Disorders, vol. 4, no. 2, pp. 84–90, 2006.
- N. Oostdam, M. N. M. van Poppel, M. G. A. J. Wouters, and W. van Mechelen, “Interventions for preventing gestational diabetes mellitus: a systematic review and meta-analysis,” Journal of Women's Health, vol. 20, no. 10, pp. 1551–1563, 2011.
- E. Oteng-Ntim, R. Varma, H. Croker, L. Poston, and P. Doyle, “Lifestyle interventions for overweight and obese pregnant women to improve pregnancy outcome: systematic review and meta-analysis,” BMC Medicine, vol. 10, article 47, 2012.
- S. L. Rifas-Shiman, J. W. Rich-Edwards, K. P. Kleinman, E. Oken, and M. W. Gillman, “Dietary quality during pregnancy varies by maternal characteristics in Project Viva: a US cohort,” Journal of the American Dietetic Association, vol. 109, no. 6, pp. 1004–1011, 2009.
- D. S. Downs and J. S. Ulbrecht, “Understanding exercise beliefs and behaviors in women with gestational diabetes mellitus,” Diabetes Care, vol. 29, no. 2, pp. 236–240, 2006.
- D. Smith and T. Lavender, “The maternity experience for women with a body mass index kg/m2: a meta-synthesis,” BJOG, vol. 118, no. 7, pp. 779–789, 2011.
- Z. Weir, J. Bush, S. C. Robson, C. McParlin, J. Rankin, and R. Bell, “Physical activity in pregnancy: a qualitative study of the beliefs of overweight and obese pregnant women,” BMC Pregnancy and Childbirth, vol. 10, article 18, 2010.
- J. G. M. Jelsma, M. N. M. van Poppel, S. Galjaard et al., “DALI: vitamin D and lifestyle intervention for gestational diabetes mellitus (GDM) prevention: an European multicentre, randomised trial—study protocol,” BMC Pregnancy and Childbirth, vol. 13, article 142, 2013.
- R. Schwarzer, “Modeling health behavior change: how to predict and modify the adoption and maintenance of health behaviors,” Applied Psychology, vol. 57, no. 1, pp. 1–29, 2008.
- W. R. Miller and S. Rollnick, Motivational Interviewing, Preparing People to Change Addictive Behavior, The Guildford Press, New York, NY, USA, 1991.
- E. A. Reece, G. Leguizamón, and A. Wiznitzer, “Gestational diabetes: the need for a common ground,” The Lancet, vol. 373, no. 9677, pp. 1789–1797, 2009.
- N. Oostdam, M. N. M. van Poppel, E. M. W. Eekhoff, M. G. A. J. Wouters, and W. van Mechelen, “Design of FitFor2 study: the effects of an exercise program on insulin sensitivity and plasma glucose levels in pregnant women at high risk for gestational diabetes,” BMC Pregnancy and Childbirth, vol. 9, article 1, 2009.
- K. Zehle, B. J. Smith, T. Chey, M. McLean, A. E. Bauman, and N. W. Cheung, “Psychosocial factors related to diet among women with recent gestational diabetes: opportunities for intervention,” The Diabetes Educator, vol. 34, no. 5, pp. 807–814, 2008.
- E. C. Kieffer, S. K. Willis, N. Arellano, and R. Guzman, “Perspectives of pregnant and postpartum Latino women on diabetes, physical activity, and health,” Health Education & Behavior, vol. 29, no. 5, pp. 542–556, 2002.
- P. L. Thornton, E. C. Kieffer, Y. Salabarría-Peña et al., “Weight, diet, and physical activity-related beliefs and practices among pregnant and postpartum latino women: the role of social support,” Maternal and Child Health Journal, vol. 10, no. 1, pp. 95–104, 2006.
- B. J. Smith, N. W. Cheung, A. E. Bauman, K. Zehle, and M. McLean, “Postpartum physical activity and related psychosocial factors among women with recent gestational diabetes mellitus,” Diabetes Care, vol. 28, no. 11, pp. 2650–2654, 2005.
- J. Ritchie and L. Spencer, “Qualitative data analysis for applied policy research,” in Analysing Qualitative Data, A. Bryman and R. Burgess, Eds., pp. 173–194, Routledge, London, UK, 1994.
- S. Monte, O. Valenti, E. Giorgio et al., “Maternal weight gain during pregnancy and neonatal birth weight: a review of the literature,” Journal of Prenatal Medicine, vol. 5, no. 2, pp. 27–30, 2011.
- K. R. Evenson and C. B. Bradley, “Beliefs about exercise and physical activity among pregnant women,” Patient Education and Counseling, vol. 79, no. 1, pp. 124–129, 2010.
- D. M. Smith, A. Cooke, and T. Lavender, “Maternal obesity is the new challenge; a qualitative study of health professionals' views towards suitable care for pregnant women with a Body Mass Index (BMI) ≥ 30 kg/m2,” BMC Pregnancy and Childbirth, vol. 12, article 157, 2012.
- P. J. Furness, K. McSeveny, M. A. Arden, C. Garland, A. M. Dearden, and H. Soltani, “Maternal obesity support services: a qualitative study of the perspectives of women and midwives,” BMC Pregnancy and Childbirth, vol. 11, article 69, 2011.
- N. Heslehurst, S. Russell, S. McCormack, G. Sedgewick, R. Bell, and J. Rankin, “Midwives perspectives of their training and education requirements in maternal obesity: a qualitative study,” Midwifery, vol. 29, no. 7, pp. 736–744, 2013.
- C. L. Lindhardt, S. Rubak, O. Mogensen, R. F. Lamont, and J. S. Joergensen, “The experience of pregnant women with a body mass index >30 kg/m2 of their encounters with healthcare professionals,” Acta Obstetricia et Gynecologica Scandinavica, vol. 92, no. 9, pp. 1101–1107, 2013.
- M. J. Brown, M. Sinclair, D. Liddle, A. J. Hill, J. Stockdale, and E. Madden, “Motivating pregnant women to eat healthily and engage in physical activity for weight managment: an exploration of routine midw,” Evidence Based Midwifery, vol. 11, no. 4, pp. 120–127, 2013.
- K. R. Evenson, M.-K. Moos, K. Carrier, and A. M. Siega-Riz, “Perceived barriers to physical activity among pregnant women,” Maternal and Child Health Journal, vol. 13, no. 3, pp. 364–375, 2009.
- K. Goodrich, M. Cregger, S. Wilcox, and J. Liu, “A qualitative study of factors affecting pregnancy weight gain in African American women,” Maternal and Child Health Journal, vol. 17, no. 3, pp. 432–440, 2013.
- H. K. Hegaard, H. Kjaergaard, P. P. Damm, K. Petersson, and A.-K. Dykes, “Experiences of physical activity during pregnancy in Danish nulliparous women with a physically active life before pregnancy. A qualitative study,” BMC Pregnancy and Childbirth, vol. 10, article 33, 2010.
- T. Bondas and K. Eriksson, “Women's lived experiences of pregnancy: a tapestry of joy and suffering,” Qualitative Health Research, vol. 11, no. 6, pp. 824–840, 2001.
- A. Gaston and A. Cramp, “Exercise during pregnancy: a review of patterns and determinants,” Journal of Science and Medicine in Sport, vol. 14, no. 4, pp. 299–305, 2011.
- P. E. Clarke and H. Gross, “Women's behaviour, beliefs and information sources about physical exercise in pregnancy,” Midwifery, vol. 20, no. 2, pp. 133–141, 2004.
- R. Artal and M. O'Toole, “Guidelines of the American College of Obstetricians and Gynecologists for exercise during pregnancy and the postpartum period,” British Journal of Sports Medicine, vol. 37, no. 1, pp. 6–12, 2003.
- A. G. Cramp and S. R. Bray, “A prospective examination of exercise and barrier self-efficacy to engage in leisure-time physical activity during pregnancy,” Annals of Behavioral Medicine, vol. 37, no. 3, pp. 325–334, 2009.
- H. K. Hegaard, B. K. Pedersen, B. B. Nielsen, and P. Damm, “Leisure time physical activity during pregnancy and impact on gestational diabetes mellitus, pre-eclampsia, preterm delivery and birth weight: a review,” Acta Obstetricia et Gynecologica Scandinavica, vol. 86, no. 11, pp. 1290–1296, 2007.
- S. Rollnick, N. Heather, R. Gold, and W. Hall, “Development of a short ‘readiness to change’ questionnaire for use in brief, opportunistic interventions among excessive drinkers,” British Journal of Addiction, vol. 87, no. 5, pp. 743–754, 1992.
- N. E. Stotland, P. Gilbert, A. Bogetz, C. C. Harper, B. Abrams, and B. Gerbert, “Preventing excessive weight gain in pregnancy: how do prenatal care providers approach counseling?” Journal of Women's Health, vol. 19, no. 4, pp. 807–814, 2010.
Copyright © 2016 Judith G. M. Jelsma et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.