1. What is Newborn Weight Loss Percentage?

The newborn weight loss percentage calculation measures how much weight a baby has lost since birth compared to their birth weight. This is an important metric in neonatal care to assess feeding adequacy and hydration status.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• \( \text{Birth weight} \) — Baby's weight at birth in grams
• \( \text{Current weight} \) — Baby's current weight in grams

Explanation: The formula calculates what percentage of the original birth weight has been lost, which helps healthcare providers determine if intervention is needed.

3. Importance of Monitoring Weight Loss

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

4. Using the Calculator

Tips: Enter birth weight and current weight in grams (most accurate). Both values must be positive numbers, with current weight less than or equal to birth weight.

5. Frequently Asked Questions (FAQ)

Q1: What is normal newborn weight loss?
A: 5-7% loss is typical in first 3-5 days. Breastfed babies may lose slightly more than formula-fed infants.

Q2: When should I be concerned?
A: If loss exceeds 10%, or if baby isn't regaining weight by day 5. Always consult your pediatrician with concerns.

Q3: How often should weight be checked?
A: First weight check at 24-72 hours after birth, then as recommended by your healthcare provider.

Q4: Does weight loss percentage differ for premature babies?
A: Preterm infants may lose more (10-15%) and take longer to regain birth weight.

Q5: When do babies typically regain birth weight?
A: Most regain by 10-14 days of age, though some may take up to 3 weeks.