Pregnancy Rates with Recombinant versus Urinary Human Chorionic Gonadotropin in In Vitro Fertilization: An Observational Study

Table 1

Patients’ enrollment, clinical characteristics and outcomes. Abbreviations: rhCG: recombinant human chorionic gonadotropin; uHCG: urinary human chorionic gonadotropin; BMI: body mass index; GnRH: gonadotrop-releasing hormone; IU: international unit; g.w: gestational week.

Clinical characteristics
	rhCG	uhCG
𝑛=	391	96
Age (years)	32.5 ± 3.5	33.3 ± 3.7
BMI (kg/m^2)	21.9 ± 2.6	22.5 ± 2.6
No. of previous attempts	1 ± 1	0.5 ± 1
Endometrium thickness (mm)	12 ± 2	11.5 ± 2
Therapeutic characteristics
GnRH agonists	159	46
GnRH antagonists	232	50
6500 IU dose	100	—
9750 IU dose	253	—
13000 IU dose	38	—
Outcome measures
Pregnancy outcomes			Total:
Laboratory verified pregnancy (n =)	169	29*	198
Pregnancy over 24th g.w (n =)	110	20	130
Laboratory verified pregnancy (%)	43%	30%	40.6%
Pregnancy over 24th g.w (%)	28%	21%	26.7%

𝑃=0.021, Chi-square-test.