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Table 1 Characteristics of patients with different pre-ovulatory E2 level patterns

From: Decrease in preovulatory serum estradiol is a valuable marker for predicting premature ovulation in natural/unstimulated in vitro fertilization cycle

Characteristics

E2(ng/mL)

P Value

Group A (> 10% increase)

(n = 403)

Group B (±10% plateau)

(n = 192)

Group C (> 10% decrease)

(n = 206)

Age of women (year)

39.87 ± 6.04

40.58 ± 5.82

40.27 ± 5.22

NS

BMI of women

21.74 ± 3.25

21.92 ± 2.57

21.51 ± 3.57

NS

Baseline FSH (mIU/mL)

9.54 ± 6.94

10.51 ± 8.88

9.30 ± 6.39

NS

AFC

1.78 ± 1.94

1.61 ± 1.71

1.76 ± 2.42

NS

Infertility duration(year)

3.93 ± 3.87

3.96 ± 4.22

3.79 ± 3.65

NS

Infertility causes, n (%)

 Tubal factor

268(66.5)

121(63.02)

132(64.08)

NS

 Male factor

85(21.09)

44(22.92)

39(18.93)

NS

 Endometriosis

65(16.13)

28(14.58)

44(21.36)

NS

 Uterine factor

29(7.20)

15(7.81)

15(7.28)

NS

 DOR

333(82.63)

167(86.98)

166(80.58)

NS

  1. Data are presented as the means ±SD. BMI body mass index. a indicates group A versus group B,C