Table 1 General patient and cycle characteristics

Age (y)

30.70 ± 3.80

BMI (kg/m²)

22.86 ± 3.26

Primary diagnosis

Anovulation

410 (53.7)

Unexplained

353 (46.2)

Type of infertility

Primary infertility

490 (64.2)

Secondary infertility

273 (35.8)

Duration of infertility (y)

2.39 ± 1.86

Cycle day 2–4 FSH level (mIU/mL)

7.88 ± 4.52

Serum AMH (ng/mL)

6.06 ± 4.72

Total motile sperm count TMC*10⁶

32.476 ± 14.28

Endometrial thickness (mm)

10.07 ± 2.15

E₂ on the day of hCG trigger (pg/mL)

251.0 (170.7, 399.7)

LH on the day of hCG trigger (IU/L)

18.1 (10.7, 34.7)

LH surge

No

314 (41.15)

Yes

449 (58.84)