Materials and Methods: Six weeks after delivery, 185 women who visited postpartum clinic and
reached the inclusion criteria (Thai pregnancy with normal pre-pregnancy BMI (18.5-24.9
kg./m2), no medical or obstetric complications during pregnancy with term delivery and
normal birth weight infant) were included. The questionnaires including age, parity, height,
pre-pregnancy weight, gestational weight gain, body weight at postpartum visit, monthly
income and the other factors (breastfeeding, nutritional status, physical activity) were
recorded and further statistically analyzed.