1. What is Infant Weight Loss Percentage?

The infant weight loss percentage calculates how much weight a newborn has lost compared to their birth weight. It's an important metric for assessing neonatal health and feeding adequacy in the first days of life.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• \( \text{Birth Weight} \) — The infant's weight at birth (kg)
• \( \text{Current Weight} \) — The infant's current weight (kg)

Explanation: The formula calculates what percentage of the original birth weight has been lost.

3. Importance of Monitoring Weight Loss

Details: Newborns typically lose 5-7% of birth weight in first few days. Losses >10% may indicate feeding problems or other health issues requiring evaluation.

4. Using the Calculator

Tips: Enter birth weight and current weight in kilograms. Both values must be positive numbers. Weights should be measured using the same scale when possible.

5. Frequently Asked Questions (FAQ)

Q1: What is normal weight loss for newborns?
A: 5-7% loss is typical in first 3-5 days. Breastfed infants often lose more than formula-fed infants initially.

Q2: When should I be concerned about weight loss?
A: Consult a pediatrician if loss exceeds 7% in first 72 hours or 10% at any time, or if infant shows signs of dehydration.

Q3: How often should newborns be weighed?
A: First weight at 24-72 hours after birth, then as needed based on feeding progress and clinical assessment.

Q4: Does this calculator account for gestational age?
A: No, the same formula applies, but interpretation varies by gestational age and clinical context.

Q5: When should birth weight be regained?
A: Most infants regain birth weight by 10-14 days of age with adequate feeding.