| < 0 mm (1) | 0-1 mm (2) | 1–2 mm (3) | ≥ 2 mm (4) | P value |
---|---|---|---|---|---|
Number | 111 | 133 | 149 | 102 | – |
Age (year) | 31.2 ± 4.5 | 32.4 ± 4.9 | 32.5 ± 5.1 | 31.5 ± 4.3 | 0.07 |
BMI (kg/m2) | 23.2 ± 3.5 | 22.3 ± 3.20 | 22.6 ± 3.2 | 22.5 ± 3.2 | 0.20 |
Baseline FSH (IU/L) | 7.0 ± 2.8 | 7.4 ± 2.3 | 7.5 ± 2.5 | 7.6 ± 1.7 | 0.31 |
E2 on HCG day (pg/mL) | 5146.5 ± 3128.9 | 4951.9 ± 2665.5 | 4536.1 ± 2373.4 | 4502.6 ± 2392.9 | 0.17 |
P on HCG day (ng/mL) | 0.9 ± 0.5 | 1.1 ± 1.0 | 1.0 ± 0.9 | 0.9 ± 0.6 | 0.35 |
Gestational age of miscarriage (week) | 9.21 ± 2.24 | 9.37 ± 2.30 | 8.97 ± 1.43 | 9.64 ± 3.15 | 0.14 |
Interval time between two cycles (day) | 389.0 ± 181.8 | 390.3 ± 182.7 | 375.2 ± 204.4 | 403.2 ± 195.4 | 0.73 |
Times of cycle cancellation in second cycle (n) | 0.1 ± 0.5 | 0.2 ± 0.5 | 0.5 ± 0.8 | 0.5 ± 0.9 | < 0.001 |
Number of embryos transferred in second cycle (n) | 1.8 ± 0.4 | 1.7 ± 0.5 | 1.8 ± 0.4 | 1.8 ± 0.4 | 0.42 |
Number of top quality embryo in second cycle (n) | 1.2 ± 0.8 | 1.1 ± 0.8 | 1.1 ± 0.9 | 1.0 ± 0.4 | 0.45 |
Endometrial thickness in second cycle (mm) | 10.2 ± 1.8 | 9.0 ± 1.2 | 8.5 ± 1.4 | 8.6 ± 1.6 | < 0.001 |
Implantation rate in second cycle (%) | 44.3 (89/201) | 41.1 (94/229) | 38.7 (101/261) | 42.0 (76/181) | 0.61 |
Clinical pregnancy rate in second cycle (%) | 59.5 (66/111) | 53.4 (71/133) | 50.3 (75/149) | 58.8 (60/102) | 0.40 |
Live birth rate in second cycle (%) | 52.3 (58/111) | 44.4 (59/133) | 40.9 (61/149) | 40.2 (41/102) | 0.24 |
Miscarriage rate in second cycle (%) | 21.2 (14/66) | 19.7 (14/71) | 12.0 (9/75) | 16.7 (10/60) | 0.47 |