Weight gain during pregnancy reflects not only the mother's health but also the fetus's development in the womb. The estimated weight gain during pregnancy is based on the mother's pre-pregnancy weight.

Pregnant women who are underweight during pregnancy will not ensure enough energy for the fetus to develop, reduce the baby's brain function and can cause the mother to face signs of premature labor, and the baby will be born with low birth weight and stunted growth, malnutrition, respiratory failure, ...