PCOS: polycystic ovary syndrome, BMI: Body mass index, SET: single embryo transfer, DET: double embryo transfer. The number of three embryo transfer is low which has been calculated in the group of DET.

Adjusted for maternal age, overweight, history of spontaneous miscarriage, number of embryos transferred and medical conditions (diabetes, hypertensive disease).

Bold indicates P- value <0.05.

Table 6. Univariable and multivariable regression analysis of risk of late pregnancy loss.