48 Is there a change in weight soon after birth? In the first 24-48 hours after birth, there are significant changes in the body. The body needs to adjust to the environment outside the uterus. Hence, fluids are adjusted in different parts of the newborn's body. As a result, body weight is lost in the first few days after birth (almost 8-10% of the birth weight). This is a normal physiological change in the body and usually gets corrected after a few days. When does the baby regain the birthweight? Usually, a baby loses body weight in the initial days after birth; this may last up to a week after delivery. During this period, breastfeeding may not be completely initiated and could add to the baby's weight loss.
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