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Percentage Weight Loss Formula:
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The Baby Percentage Weight Loss calculation measures how much weight a newborn has lost compared to their birth weight. This is particularly important for monitoring breastfeeding adequacy and identifying potential health issues in the early postnatal period.
The calculator uses the percentage weight loss formula:
Where:
Explanation: The formula calculates what percentage of the original birth weight has been lost, which helps assess whether the weight loss is within normal limits or requires medical attention.
Details: Monitoring weight loss in newborns is crucial as excessive weight loss can indicate feeding problems, dehydration, or other health issues. Most newborns lose 5-7% of their birth weight in the first few days, with losses >10% warranting evaluation.
Tips: Enter both weights in kilograms (kg). For accurate results, use weights measured on the same scale. Current weight should be measured after birth (typically daily in the first week).
Q1: What is considered normal weight loss for a newborn?
A: Most newborns lose 5-7% of birth weight in first 3-5 days. Losses >7% may need evaluation, and >10% typically requires intervention.
Q2: When should I be concerned about my baby's weight loss?
A: Contact your pediatrician if weight loss exceeds 7% in first 72 hours, 10% at any time, or if baby isn't regaining birth weight by 2 weeks.
Q3: How often should newborns be weighed?
A: Typically weighed at birth, 24 hours, 48 hours, and at first pediatric visit (3-5 days old). More frequent weighing may be needed if concerns exist.
Q4: Does this calculator apply to premature babies?
A: Premature babies may have different weight loss patterns. Consult your neonatologist for evaluation specific to preterm infants.
Q5: When should babies regain their birth weight?
A: Most term babies regain birth weight by 10-14 days of age with adequate feeding.