Table 2.
Cycle characteristics by female BMI.
| Variable | >18.50 | 18.50–24.99 | 25.0–29.99 | ≥30 | p Value | |
|---|---|---|---|---|---|---|
| (n = 141) | (n = 1164) | (n = 225) | (n = 72) | |||
| Duration of stimulation (d) | 10.35 ± 2.17 | 10.01 ± 2.55 | 10.09 ± 2.19 | 10.52 ± 1.72 | 0.53 | |
| Total dose of gonadotrophin (IU) | 2439 ± 1403 | 2658 ± 1406 | 2573 ± 1029 | 2788 ± 1222 | 0.58 | |
| Ovarian stimulation protocol n (%) | ||||||
| GnRH antagonist | 101 (71.6%) | 842 (72.3%) | 180 (80.0%) | 53 (73.6%) | ||
| Long | 32 (22.7%) | 262 (22.5%) | 37 (16.4%) | 16 (22.2%) | ||
| Others | 8 (5.7%) | 60 (5.2%) | 8 (3.6%) | 3 (4.2%) | 0.41 | |
| E2 on hCG day (pg/mL) | 1823.07 ± 969.29 | 1716 ± 1092 | 1883 ± 1354 | 1571 ± 872 | 0.17 | |
| Retrieved oocytes (n) | 8.26 ± 5.87 | 8.17 ± 6.09 | 7.88 ± 5.83 | 6.22 ± 4.73 | 0.06 | |
| MII (%) | 74.56 ± 21.93 | 76.93 ± 24.75 | 73.15 ± 24.96 | 67.24 ± 30.55 | 0.005 a | |
| Cycles without oocytes n (%) | 12 (8.5%) | 98 (8.4%) | 20 (8.9%) | 10 (13.9%) | 0.46 | |
| Used oocytes (n) | 5.61 ± 3.94 | 5.99 ± 4.12 | 5.62 ± 4.29 | 4.19 ± 3.43 | 0.003 a | |
| ICSI (%) | 110/129 (85.3%) | 902/1066 (84.6%) | 181/205 (88.3%) | 56/62 (90.3%) | 0.37 | |
| Fertilization rate (%) | 68.05 ± 28.61 | 67.22 ± 27.12 | 66.34 ± 29.47 | 60.98 ± 28.49 | 0.35 | |
| Embryo quality score | 1.90 ± 0.66 | 2.03 ± 0.71 | 1.96 ± 0.73 | 1.92 ± 0.77 | 0.27 | |
| Day of ET | ||||||
| Day 3 | 52/84 (61.9) | 486/763 (63.7) | 91/140 (65.0) | 39/50 (78.0) | ||
| Day 5 | 32/84 (38.1) | 277/763 (36.3) | 49/140 (35.0) | 11/50 (22.0) | 0.22 | |
| Embryos transferred (n) | 1.69 ± 0.64 | 1.74 ± 0.62 | 1.73 ± 0.69 | 1.68 ± 0.59 | 0.81 | |
| Blastulation rate (%) | 53.57 ± 23.09 | 56.57 ± 22.46 | 53.07 ± 20.75 | 52.65 ± 29.47 | 0.46 | |
Notes: Data presented as mean ± SD, n (%) or proportion (%). a Pairwise comparison revealed a statistically significant difference between the second and the fourth BMI categories.