Concerning postpartum BMI in our study, we found that 19.5% (36/185) and 0.5% (1/185) of our subjects became overweight and obesity, respectively. Appropriate nutritional recommendation during postpartum period and even during pregnancy should be realized by the obstetricians for the maternal and fetal welfare. The underweight group was 1% (2/185) and was also the problem, for example, during breastfeeding.