From the Guidelines
A 2% increase in birth weight at 2 weeks of age is not a cause for concern and is actually a positive sign of growth and development. According to the guidelines on pediatric parenteral nutrition, a postnatal weight loss of 6-7% is expected in breastfed infants, and a weight gain after this initial loss is a normal part of development 1. In fact, a 2% increase in birth weight at two weeks of age indicates that the baby is growing and receiving adequate nutrition.
Some key points to consider:
- Healthy newborns generally gain about 0.5-1 ounce (15-30 grams) per day in the first month, which translates to roughly 4-7% weight gain per week 1.
- The weight gain occurs because the baby is receiving adequate nutrition, either through breastfeeding or formula feeding.
- Tracking weight gain over time is more informative than a single measurement, and regular pediatric check-ups will monitor your baby's growth curve to ensure they're developing appropriately.
- A high weight gain or loss may indicate underlying issues, such as inadequate fluid or nutrient intake, but a 2% increase at two weeks is within normal expectations 1.
It's essential to note that every baby grows at their own pace, and factors such as hydration status, environmental conditions, and nutritional intake can influence postnatal weight loss and gain 1. However, in general, a 2% increase in birth weight at two weeks of age is a positive sign and not a cause for concern.
From the Research
Assessment of 2% Increase in Birth Weight at 2 Weeks
- A 2% increase in birth weight at 2 weeks of age may not be a cause for concern, as healthy, breastfed infants typically regain their birth weight by age 2 weeks and then gain weight steadily 2.
- According to a study published in the Journal of obstetric, gynecologic, and neonatal nursing, breastfed newborns usually regain their birth weight by 10 to 14 days 3.
- The American Academy of Pediatrics recommends monitoring infant growth during the first 3 months of life to detect and manage breastfeeding difficulties that lead to slow weight gain and subsequent low milk production 2.
- Another study found that early limited formula use may reduce longer-term formula use at 1 week and increase breastfeeding at 3 months for some infants 4.
Expected Weight Changes in Breastfed Newborns
- Breastfed newborns typically lose 6% to 7% of their birth weight by 2 days after birth, and 7% to 8% by Day 3 3.
- The nadir of lost birth weight usually occurs on Days 2,3, or 4 after birth, and most newborns regain their birth weight by 10 to 14 days 3.
- A study published in Pediatrics found that healthy, breastfed infants lose less than 10% of birth weight and return to birth weight by age 2 weeks 2.
Monitoring Infant Growth
- Pediatricians must monitor early breastfeeding to detect and manage breastfeeding difficulties that lead to slow weight gain and subsequent low milk production 2.
- Infant growth during the first 3 months of life provides a clear indication of breastfeeding progress, and any deviation from the expected pattern is cause for concern 2.
- A thorough evaluation of the breastfeeding process, including history taking and physical examination for the mother and infant, is crucial in cases of slow weight gain 2.