Calo di peso del neonato: calcolatore (prime 2 settimane)
Calcola il calo di peso del neonato: la variazione % dal peso alla nascita nei giorni 0–14, accanto alla curva mediana, e una data indicativa di recupero.
How much weight loss is typical for a newborn?
Some weight loss in the first days is common and usually stops after about 3–4 days. In a large study of exclusively breastfed babies, the median loss at 48 hours was about 7% (vaginal birth) and 8% (cesarean). If your baby has lost **10% or more**, contact your midwife or doctor today for a feeding and health check (NICE NG75).
When should my baby regain their birth weight?
Most babies are back to birth weight by about **2 weeks**, and almost all by **3 weeks** (AAP). If your baby hasn’t regained it by 3 weeks, NICE advises a review with your healthcare team.
Why do newborns lose weight after birth?
Fluid shifts, meconium passage, and feeding adjustment cause early weight loss. This is usually temporary and expected.
What if my baby hasn’t regained weight by 2 weeks?
It’s best to check with your pediatrician. Feeding assessment or additional support may be needed.
Does breastfeeding vs. formula feeding affect weight change?
Yes. Exclusively breastfed babies may lose slightly more in the first days but catch up once milk supply increases.
What should I do if weight loss reaches 10%?
Contact your **midwife or doctor today** so they can check feeding, hydration and your baby’s overall health. If your baby is also very sleepy and hard to wake, or has far fewer wet or dirty diapers than expected, **contact them immediately**.
Can I rely only on this tool for monitoring?
No. This tool is a **guide**. Always combine it with professional medical advice and regular check-ups.
How do I calculate my newborn’s weight loss percentage?
Subtract birth weight from current weight, divide by birth weight and multiply by 100. For example, (3.20 − 3.40) ÷ 3.40 × 100 = −5.9%. The calculator does this for you in kg or lb.
Is a 10% weight loss typical for a newborn?
A loss of up to about 10% can happen, but it’s more than most babies lose. NICE NG75 recommends a clinical assessment and feeding support when a baby loses more than 10% in the early days. If your baby has lost **10% or more**, contact your midwife or doctor today.