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 a crucial metric in neonatal care to assess feeding adequacy and identify potential health issues.

2. How Does the Calculator Work?

The calculator uses the following equation:

Where:

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

Explanation: The formula calculates the relative weight loss as a percentage of the original birth weight.

3. Importance of Monitoring Weight Loss

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

4. Using the Calculator

Tips: Enter both weights in kilograms (kg). Use accurate measurements taken with the same scale for best results. Weights must be greater than zero.

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, then regain it by 10-14 days. Breastfed babies may lose slightly more than formula-fed infants.

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 birth weight by 2 weeks.

Q3: How often should newborns be weighed?
A: Typically weighed at birth, 24-72 hours after birth, at 1 week, and at 2 weeks. More frequent monitoring may be needed if concerns exist.

Q4: Does weight loss percentage differ for premature babies?
A: Preterm infants may lose more weight (up to 15%) and take longer to regain birth weight. Their care should be guided by neonatologists.

Q5: How accurate does the scale need to be?
A: For newborns, use a digital scale accurate to at least 10 grams (0.01 kg) for reliable measurements.