1. What is Newborn Weight Loss Percentage?

The newborn weight loss percentage calculates 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 compares the difference between birth weight and current weight to the original birth weight, expressed as a percentage.

3. Importance of Monitoring Weight Loss

Details: Normal newborns typically lose 5-7% of birth weight in the first few days, with breastfed babies often losing more than formula-fed infants. Weight loss >10% may indicate feeding problems or other issues requiring medical evaluation.

4. Using the Calculator

Tips: Enter both weights in grams (1 kg = 1000 g). Ensure weights are measured accurately using the same scale. Day 1 weight should be the lowest weight after birth, not necessarily the birth weight.

5. Frequently Asked Questions (FAQ)

Q1: What is considered normal weight loss for a newborn?
A: 5-7% loss is typical in first 3-4 days. Most babies regain birth weight by 10-14 days of age.

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

Q3: How often should newborns be weighed?
A: Typically at birth, day 3-5, and at 2 weeks. More frequent monitoring may be needed for babies with excessive loss.

Q4: Does the type of feeding affect weight loss?
A: Yes, breastfed babies often lose more weight initially than formula-fed babies but catch up by 2-3 weeks.

Q5: What factors besides feeding can affect weight loss?
A: Initial fluid loss, meconium passage, ambient temperature, and infant health status can all influence early weight patterns.