According to the WHO, the average birth weight of a full-term male baby is 7 pounds (lb) 6 ounces (oz), or 3.3 kilograms (kg). The average birth weight of a full-term female is 7 lb 2 oz, or 3.2 kg.
Factors That Can Affect Your Baby’s Birth Weight:
Here are just some of the factors that can affect your baby’s birth weight:
- The length of the pregnancy.
- Genetics.
- Birth order.
- Gender.
- Your health.
- A poor diet during pregnancy.
- Your baby’s health.
- Ethnicity.
- If you’re pregnant with multiples.
Newborn Weight Loss
It is normal for babies to experience some weight loss in the first days after birth and usually relates to body fluid adjustments. This weight loss usually stops after about 3 or 4 days of life. Most infants have returned to their birth weight by 3 weeks of age.

