AMH, anti-Müllerian hormone; AFC, antral follicle count; BMI, body mass index; DBP, diastolic blood pressure; FBG=fasting blood glucose; FSH=follicle-stimulating hormone; Gn, gonadotropin; HCG, human chorionic gonadotropin; IU, international units; LH, luteinizing hormone; PCOS, polycystic ovary syndrome phenotype; SBP, systolic pressure; To, total testosterone concentration

^a P -value < 0.05 compared with phenotype A

^b P -value < 0.05 compared with phenotype B

^c P -value < 0.05 compared with phenotype C

^d P -value < 0.05 compared with phenotype D

^e P -value < 0.05 compared with control group

Table 2 FET cycle characteristics and pregnancy outcomes of four PCOS phenotype and control groups