Table 2 Treatment and in vitro fertilization parameters
|  | OHSS high-risk groups (n = 281) | OHSS non high-risk group | ||||
|---|---|---|---|---|---|---|
Letrozole group | Mifepristone group | GnRH-ant group | Three-drug group | Control group | ||
(n = 43) | (n = 51) | (n = 39) | (n = 28) | (n = 120) | (n = 4454) | |
Estradiol (pg/ml)a | 7871.8 ± 2527.2 | 8012.4 ± 2252.6 | 8449.3 ± 2391.8 | 8225.6 ± 2734.3 | 8437.1 ± 2885.9 | 2825.6 ± 1754.2* |
No. follicles with diameter > | 29.2 ± 8.4 | 28.3 ± 7.6 | 30.6 ± 7.3 | 30.3 ± 8.1 | 31.1 ± 6.9 | 16.5 ± 6.3* |
14Â mm | Â | Â | Â | Â | Â | Â |
No. oocytes retrieved | 27.4 ± 6.6 | 25.1 ± 5.7 | 27.3 ± 5.9 | 26.8 ± 6.2 | 26.4 ± 6.1 | 12.2 ± 6.4* |
Fertilization rate (%) | 82.8 | 80.6 | 81.1 | 79.7 | 83.2 | 79.5 |
Cleavage rate (%) | 98.3 | 97.5 | 98.3 | 97.1 | 97.9 | 98.2 |
Quality embryo rate (%) | 62.7 | 60.8 | 63.1 | 59.7 | 61.9 | 63.6 |
No. usable embryos (n) | 13.2 ± 5.8 | 12.4 ± 4.9 | 13.6 ± 5.1 | 12.5 ± 5.6 | 13.7 ± 6.3 | 6.2 ± 2.7* |