Table 3. Subgroup analysis according to estradiol levels at the time of human chorionic gonadotropin administration.

Values are presented as number (%) or mean±standard deviation.

E2, estradiol; hCG, human chorionic gonadotropin; P4, progesterone; CPR, clinical pregnancy rate; ET, embryo transfer; PL, premature luteinization; NS, not significant; BMI, body mass index; AMH, anti-Müllerian hormone; LH, luteinizing hormone; MCD, menstrual cycle day; FSH, follicle-stimulating hormone.

^a)p=0.648; ^b)p=0.001; ^c)Tested using the chi-square test.