My mom is worried about my baby because she says he's too skinny. I say he's just fine, but she has this idea that a baby isn't healthy unless he's chubby.
Babies vary greatly in size and body type, and there's a wide range of normal.
In fact, up to the age of 2 years, a baby's weight is not predictive of size or weight later in childhood or adulthood. There are two situations in which a baby's weight may be cause for concern. Low birth weight is sometimes a result of maternal smoking or poor nutrition during pregnancy. A second scenario is a baby whose growth proceeds at a slower rate than normal. Chances are your baby is just fine.