Fetal weight at birth

The weight of most children born after the full term of pregnancy ranges between 2.7-4.08 kilograms, and these weights vary depending on several factors,[1] The weight and height of the child at birth can be known from the following table:[2]

the age

the size





3.03-3.6 kg

2.9-3.5 kg


48.5-51 cm

48-50.2 cm

Factors that affect a child’s weight

Factors that affect the weight and size of a newborn baby include:[3]

  • Birth order: Firstborns tend to be smaller than those born later.
  • Gender: Females tend to be smaller than males, but these differences are slight at birth.
  • Maternal health during pregnancy: The health of the mother can affect the weight of the fetus, especially the mother who suffers from high blood pressure or heart problems, or who tends to drink cigarettes, drugs and alcohol during pregnancy, which is not allowed during pregnancy, and the fetus may tend to be overweight High if the mother is diabetic or obese.
  • Nutrition during pregnancy: Good nutrition during pregnancy is essential for the growth of the child, and poor nutrition can cause poor weight for the fetus, while gaining excess weight during pregnancy increases the possibility of giving birth to a child with a higher than average weight.
  • Heredity: The size of each parent affects the size of the child.[4]
  • Pregnancy Duration: The duration of pregnancy affects the weight and size of the child, for example, children born before their due date are usually smaller in size, while children born after the date of birth are of greater than average weight.

Baby weight after birth

Newborns often gain weight after their stay in the hospital or after 48-72 hours, as the weight of the child must be increased a week after birth or two weeks in order to verify the presence of health risks, and parents must check the weight of the child after the first week From birth, this can be done by monitoring the consumption of food and diapers, for example, a child should consume approximately 5-7 wet diapers per day.[1]

the reviewer

  1. ^ a b “Monitoring Your Newborn’s Weight Gain”, www.americanpregnancy.org, Retrieved 9-10-2018. Edited.
  2. ↑ “Your child’s size and growth timeline”, www.babycenter.com, Retrieved 9-10-2018. Edited.
  3. ↑ Mary L. Gavin, “Your Newborn’s Growth”, www.kidshealth.org, Retrieved 9-10-2018. Edited.
  4. ↑ Corey Whelan (15-5-2018), “What’s the Average Baby Weight by Month?”, www.healthline.com, Retrieved 9-10-2018. Edited.

The best birth weight for the fetus