Table 2. Demographics of patients and IVF outcomes between patients with and without premature luteinization, as defined by a progesterone cutoff value of 0.9 ng/mL.

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

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

^a)Tested using the chi-square test.