Weight Loss Percentage Formula:
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Neonatal weight loss refers to the normal physiological weight reduction that occurs in newborns during the first few days of life. Most infants lose between 5-10% of their birth weight before starting to regain weight.
The calculator uses the following formula:
Where:
Explanation: The formula calculates what percentage of the original birth weight has been lost.
Details: Monitoring weight loss helps assess whether the newborn is feeding adequately and can identify when intervention might be needed. Excessive weight loss (>10%) may indicate feeding problems or other medical issues.
Tips: Enter both weights in pounds. For accurate results, weigh the baby at the same time of day using the same scale. Birth weight should be from within 24 hours of delivery.
Q1: What is normal weight loss for a newborn?
A: Most newborns lose 5-7% of birth weight, with up to 10% considered normal in breastfed infants. Losses >10% may require evaluation.
Q2: When should babies regain birth weight?
A: Most infants regain birth weight by 10-14 days of age. Formula-fed babies often regain it sooner than breastfed babies.
Q3: How often should newborns be weighed?
A: Typically at birth, hospital discharge, and at the first pediatric visit (3-5 days old). More frequent weighing may be needed if concerns exist.
Q4: Does weight loss differ for premature babies?
A: Yes, premature infants often lose more weight (10-15%) and take longer to regain birth weight compared to term infants.
Q5: What causes excessive weight loss?
A: Possible causes include inadequate milk intake, breastfeeding difficulties, dehydration, or medical conditions requiring evaluation.