Clinical Study
Singleton Pregnancy Outcomes after In Vitro Fertilization with Fresh or Frozen-Thawed Embryo Transfer and Incidence of Placenta Praevia
Table 1
Clinical characteristics of patients having fresh and frozen-thawed ET.
| | | Frozen-thawed ET
Number of cases
(%) | Fresh ET
Number of cases
(%) | value |
| | Number of patients | 211 | 915 | | | Mean age (years ± SD) | 33.5 ± 3.7 |
33.4 ± 4.0 | 0.724 | | Multiparous | 80 (39.7) | 232 (25.4) |
*<0.001 | | Previous abortions (mean, range) | 0.46 (0–4) | 0.33 (0–6) |
*0.011 | | Single ET | 51 (24.2) | 164 (17.9) |
*0.041 | | Double ET | 160 (75.8) | 751 (82.1) | | Blastocyst transfer | 194 (91.9) | 802 (87.5) | | | Double blastocyst transfer | 142 (67.3) | 454 (49.6) | | Previous IVF attempts (mean ± SD) | 1.89 ± 1.2 | 2.19 ± 2.1 |
*0.03 | | 1 attempt | 117 (55.5) | 406 (44.5) | | 2 attempts | 46 (21.8) | 248 (27.2) | | 3 attempts | 32 (15.2) | 112 (12.3) | | 4 attempts | 9 (4.3) | 73 (8.0) | | 5 attempts | 2 (0.9) | 29 (3.2) | | 6 attempts | 3 (1.4) | 15 (1.6) | | 7 attempts | 2 (0.9) | 11 (1.2) | | 8 and more attempts | 0 | 19 (2.2) | | Infertility cause | | | | | Tubal | 52 (24.6) | 253 (27.7) | 0.511 | | Endometriosis | 43 (20.3) | 187 (20.4) | 0.982 | | Endocrine | 44 (20.9) | 198 (21.6) | 0.931 | | Male | 39 (18.5) | 166 (18.1) | | | Others** | 33 (15.6) | 111 (12.1) | 0.277 |
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Statistically significant , as revealed by Chi-square or Mann-Whitney test. **Other causes include oncologic patients and idiopathic infertility.
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