Table 2 Basic parameters and ectopic pregnancy rates in fresh embryo transfer cycles with different body mass index (kg/m2)
< 18.5 | 18.5–23.9 | ≥ 24 | P value | |
|---|---|---|---|---|
No. | 1703 | 16,840 | 9057 | |
Age (year) | 28.93 ± 3.80 | 30.26 ± 4.30 | 30.74 ± 4.55 | < 0.001 |
BMI (kg/m2) | 17.72 ± 0.66 | 21.35 ± 1.47 | 26.56 ± 2.12 | < 0.001 |
Infertility type | < 0.001 | |||
Primary | 1097 (64.42%) | 9437 (56.04%) | 4731 (52.24%) | |
Secondary | 606 (35.58%) | 7403 (43.96%) | 4326 (47.76%) | |
Tubal factor existed | < 0.001 | |||
Yes | 772 (45.33%) | 6740 (40.02%) | 3463 (38.24%) | |
No | 931 (54.67%) | 10,100 (59.98%) | 5594 (61.76%) | |
Peak Estrogen (pg/ml), Mean (25th ,75th ) | 3787 (2513, 5356) | 3324 (2191, 4891) | 2676 (1752, 4034) | < 0.001 |
Endometrial thickness (mm) | 12.31 ± 2.45 | 12.42 ± 2.59 | 12.40 ± 2.61 | < 0.001 |
Type of embryos | < 0.001 | |||
Cleavage | 1424 (83.62%) | 13,807 (81.99%) | 6991 (77.19%) | |
Blastocyst | 279 (16.38%) | 3033 (18.01%) | 2066 (22.81%) | |
No. of embryos transferred | 1.79 ± 0.43 | 1.79 ± 0.45 | 1.73 ± 0.48 | |
1 | 367 (21.55%) | 3818 (22.67%) | 2608 (28.80%) | |
2 | 1322 (77.63%) | 12,694 (75.38%) | 6312 (69.69%) | < 0.001 |
3 | 14 (0.82%) | 328 (1.95%) | 137 (1.51%) | |
Ectopic pregnancy, n (%) | 56 (3.29%) | 386 (2.29% ) | 230 (2.54%) | 0.029 |