06/10/2026
Weighing a baby 24 hours after birth is considered the most accurate baseline because it accounts for fluid diuresis.
Right after delivery, babies are often bloated and hold onto extra fluids, especially if you received IV fluids during labor.
This artificially inflates the birth weight. Waiting 24 hours allows the newborn to shed these excess fluids, resulting in a truer, more accurate baseline weight.
Using this 24-hour weight offers several advantages:
Using the immediate delivery-room weight can make normal initial weight loss look like a dangerous drop. The 24-hour mark provides a more realistic starting point to track subsequent feeding and hydration.
Because the 24-hour weight avoids the inflated birth weight, it prevents parents and doctors from unnecessarily worrying or resorting to formula supplementation.
It enables healthcare providers to more accurately determine if a baby’s physiological weight loss is within the standard, safe range of 5% to 10%.
Did you know this? Learn about this and other helpful information in my prenatal breastfeeding class available on my website.
