1. What is Newborn Weight Loss Percentage?

The newborn weight loss percentage calculates how much weight a baby has lost compared to their birth weight. It's an important metric for assessing feeding adequacy in the early days after birth.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

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

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

3. Importance of Monitoring Weight Loss

Details: Monitoring weight loss helps identify feeding problems early. While some weight loss is normal (typically 5-7% in first few days), excessive loss (>10%) may indicate feeding difficulties or other health concerns.

4. Using the Calculator

Tips: Enter birth weight and current weight in kilograms. Both values must be positive numbers. The calculator will show the percentage of weight lost since birth.

5. Frequently Asked Questions (FAQ)

Q1: What is normal newborn weight loss?
A: Most newborns lose 5-7% of birth weight in first 3-5 days. Loss >10% may warrant evaluation of feeding.

Q2: When should I be concerned about weight loss?
A: Consult a pediatrician if loss exceeds 10% or if baby isn't regaining birth weight by 2 weeks.

Q3: How often should newborns be weighed?
A: Typically at birth, 24-48 hours after birth, and at first pediatric visit (3-5 days old).

Q4: Does weight loss differ for breastfed vs formula-fed babies?
A: Breastfed babies may lose slightly more weight initially but should follow similar patterns of regain.

Q5: When do babies typically regain birth weight?
A: Most regain birth weight by 10-14 days of age, though this can vary.