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Table 2 Treatment and in vitro fertilization parameters

From: Can steroidal ovarian suppression during the luteal phase after oocyte retrieval reduce the risk of severe OHSS?

  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*
14 mm       
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*
  1. Values are means ± SD. Values in parentheses are percentages
  2. *P < 0.01 compare with each high-risk subgroup
  3. aSerum oestradiol concentration on the day of human chorionic gonadotrophin (HCG) administration