1. What is Weight Loss Percentage?

The weight loss percentage calculation measures how much weight a newborn has lost compared to their birth weight. It's an important indicator of neonatal health and feeding adequacy in the first days of life.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• \( birth\ weight \) — Newborn's weight at birth in grams
• \( current\ weight \) — Newborn's current weight in grams

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 days. Loss >10% may indicate feeding problems or other issues requiring medical attention.

4. Using the Calculator

Tips: Enter birth weight and current weight in grams. 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 weight loss for newborns?
A: 5-7% loss is typical in first 3-5 days. Most regain birth weight by 10-14 days.

Q2: When should I be concerned?
A: Contact pediatrician if loss exceeds 7% in first 72 hours or 10% total, or if baby isn't regaining weight by day 5.

Q3: How often should weight be measured?
A: First weigh-in at birth, then at 24-72 hours after birth, and at first pediatric visit (3-5 days old).

Q4: Does this apply to premature babies?
A: Premature infants may lose more (10-15%) and take longer to regain. Consult neonatologist for specific guidelines.

Q5: What affects weight loss percentage?
A: Feeding method (breast vs formula), maternal fluids during labor, and infant health status all influence weight changes.