What Is the Expected Weight Gain for a Baby?


Quick Answer

The Mayo Clinic states that during the first six months, infants gain 5 to 7 ounces per week. During the following six months, infants gain 3 to 5 ounces per week. Numerous factors play into the expected weight gain of an infant.

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Full Answer

By the time infants turn one, they are typically three times their birth weight, states the Mayo Clinic. However, there may be times when infants may stop gaining weight or even lose weight, and it is still normal. For example, the American Pregnancy Association explains that it is normal for a formula-fed newborn to lose 5 percent of his birth weight during the first seven days of his life. Likewise, it is normal for a breast-fed newborn to lose 10 percent of his birth weight within seven days of being born.

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