Like many other new parents, you are wondering if your baby is gaining weight, and if their weight gain is normal for their age. After birth, babies lose about 5-10% of their birth weight in the first 48 hours. This extra weight they were carrying is usually extra fluid and stool. By day 10-14 they should return back to their birth weight. Following this time, each baby gains, on average, 15-30 grams per day until they reach 3 months of age. In order to achieve this weight gain babies rely on feeding breastmilk or formula (Refer to my previous post on when to start feeding your baby solid food). You will see most of this growth in their length as they grow 1 inch per month for the first 6 moths, followed by half and inch a month from 6 months to 1 year. You can determine if your baby is getting enough fluid if they are having approximately 6-8 wet diapers in 24 hours.
Talk to your doctor or Nurse Practitioner (NP) if you are concerned about your baby’s weight gain. They will usually closely monitor the weight of your newborn for the first month, so do not be surprised if you are visiting your doctor or NP every 3-7 days for the first month.