Maternal characteristics
A total of 2,449 mothers were analyzed. The median age of the population was 34 years (IQR 30.01 – 37) and the median BMI was 22.96 kg/m2 (IQR 20.76 – 25.95). Baseline characteristics of the mothers are shown in Table 1. Pregnancies resulting from ART were most common in the underweight group and lowest in the obese group. While rates of primiparas were similar in underweight and normal weight mothers, they decreased in overweight and obese mothers. Within the obese group, the highest rate was among obesity class I mothers. Rates of history of cesarean sections increased parallel to weight classes. Rates of underlying hypertension and diabetes mellitus were the highest among obesity class II mothers.