1. What is Newborn Weight Loss?

Newborn weight loss refers to the normal physiological weight reduction that occurs in the first few days after birth. Most newborns lose 5-10% of their birth weight in the first week before regaining it by 2 weeks of age.

2. How Does the Calculator Work?

The calculator uses the weight loss percentage formula:

Where:

• \( birth \) — Birth weight in grams
• \( current \) — Current weight in grams

Explanation: The formula calculates the percentage of weight lost relative to the original birth weight.

3. Importance of Monitoring Weight Loss

Details: Monitoring newborn weight loss helps identify excessive loss that may indicate feeding problems, dehydration, or other health issues requiring medical attention.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What is normal newborn weight loss?
A: Most newborns lose 5-10% of their birth weight in the first week. Loss >10% may require evaluation.

Q2: When should a newborn regain birth weight?
A: Typically by 2 weeks of age, though breastfed babies may take slightly longer.

Q3: How often should weight be checked?
A: First weight check at 3-5 days old, then as needed based on feeding and weight patterns.

Q4: What causes excessive weight loss?
A: Possible causes include inadequate milk intake, breastfeeding difficulties, or medical conditions.

Q5: When should I be concerned?
A: Contact your pediatrician if loss exceeds 10%, baby has few wet diapers, or seems lethargic.