Why is my baby gaining weight so slowly?

See the Pediatrician: Your baby's pediatrician should closely monitor your baby's weight gain and growth. Generally, babies lose weight immediately after birth, then get back to their birth weight by 2 weeks of age. After that, they should gain about 1- 1.5 ounce per day!. The rate of weight gain usually slows after 6 months, but always check with your doctor if you are not sure your baby is growing.

Nutrition: Baby's weight gain is dependent on how many calories taken in versus how many are required to do whatever the baby does (eat, sleep, cry, grow). If calories are low, weight gain will be slow. Weight gain can be slow in the face of high calorie intake if the baby has some condition that causes increased calorie requirement like heart disease or some other illnesses. See your pediatrician.