Table 2 Baseline characteristics and pregnancy outcomes of patients with two embryos transferred in two groups (\(\bar x\) ± s; %)
Indicators | Two embryos transferred | ||
|---|---|---|---|
Conventional ET (1080) | Sequential ET (n = 254) | P-value | |
Age (yr) | 31.73 ± 4.47 | 31.41 ± 4.18 | 0.357 |
BMI (kg/m2) | 22.52 ± 3.53 | 22.61 ± 3.19 | 0.682 |
Infertility duration (yr) | 3.73 ± 2.80 | 3.57 ± 2.71 | 0.637 |
AMH (ng/ml) | 5.71 ± 4.81 | 5.70 ± 4.76 | 0.978 |
bFSH (mIU/ml) | 6.68 ± 3.75 | 6.87 ± 2.19 | 0.363 |
Number of failed cycles | 3.03 ± 1.69 | 2.83 ± 1.57 | 0.167 |
Endometrial thickness (mm) | 10.92 ± 2.16 | 10.88 ± 1.98 | 0.751 |
High-quality embryos rate | 43.0 (929/2160) | 44.9 (228/508) | 0.443 |
Primary infertility rate | 53.6 (579/1080) | 59.8 (152/254) | 0.073 |
Infertility factors | Â | Â | Â |
Male factors | 19.7 (213/1080) | 24.0 (61/254) | 0.128 |
Tube and pelvic factors | 42.5 (459/1080) | 40.2 (102/254) | 0.474 |
Ovulatory factors | 6.1 (66/1080) | 5.1 (13/254) | 0.546 |
Couples’ factors | 23.6 (255/1080) | 20.9 (53/254) | 0.350 |
Others | 8.1 (87/1080) | 9.8 (25/254) | 0.355 |
Clinical pregnancy rate | 23.6 (255/1080) | 30.3 (77/254) | 0.026* |
Implantation rate | 14.4 (310/2160) | 18.3 (93/508) | 0.025* |
Multiple pregnancy rate | 21.6 (55/255) | 23.4 (16/77) | 0.737 |
Miscarriage rate | 11.8 (30/255) | 15.6 (12/77) | 0.377 |