Table 5 Baseline characteristics and pregnancy outcomes of patients with different stages of blastocyst transferred in the sequential ET group (\(\bar x\) ± s; %)
Indicators | D5 blastocyst transferred (n = 216) | D6 blastocyst transferred (n = 144) | P-value |
|---|---|---|---|
Age (yr) | 31.76 ± 4.52 | 31.69 ± 4.41 | 0.874 |
BMI (kg/m2) | 22.77 ± 3.75 | 22.34 ± 3.19 | 0.261 |
Infertility duration (yr) | 3.78 ± 2.85 | 3.69 ± 2.70 | 0.770 |
AMH (ng/ml) | 5.70 ± 4.90 | 5.76 ± 4.78 | 0.901 |
bFSH (mIU/ml) | 6.81 ± 4.13 | 6.52 ± 3.00 | 0.463 |
Number of failed cycles | 3.16 ± 1.64 | 3.33 ± 1.77 | 0.348 |
Number of embryos transferred | 2.27 ± 0.45 | 2.31 ± 0.47 | 0.397 |
Endometrial thickness (mm) | 10.74 ± 2.08 | 11.06 ± 2.26 | 0.139 |
High-quality cleavage-stage embryo rate | 43.3 (101/233) | 40.4 (76/188) | 0.546 |
Primary infertility rate | 59.7 (129/216) | 56.9 (82/144) | 0.600 |
Infertility factors | Â | Â | Â |
Male factors | 24.5 (53/216) | 22.9 (33/144) | 0.724 |
Tube and pelvic factors | 43.1 (93/216) | 37.5 (54/144) | 0.293 |
Ovulatory factors | 5.6 (12/216) | 4.2 (6/144) | 0.554 |
Couples’ factors | 19.0 (41/216) | 24.3 (35/144) | 0.225 |
Others | 7.9 (17/216) | 11.1 (16/144) | 0.297 |
Clinical pregnancy rate | 33.8 (73/216) | 28.5 (41/144) | 0.287 |
Implantation rate | 19.6 (97/494) | 15.4 (51/332) | 0.116 |
Multiple pregnancy rate | 24.7 (18/73) | 19.5 (8/41) | 0.530 |
Miscarriage rate | 12.3 (9/73) | 14.6 (6/41) | 0.727 |