Rh disease RH factor is a protein on some people's red blood cells. Learn how RH disease affects your baby and how to prevent it.
Low birthweight Low birthweight is when a baby is born weighing less than 5 pounds, 8 ounces. Learn about the causes, risks and health-related effects of low birthweight.
Isotretinoin and other retinoids during pregnancy If you're pregnant, oral retinoids may increase your baby's risk for birth defects. Learn how to protect your baby from the effects of isotretinoin.