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Birth weight

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

The average normal birth weight at term is about 3.5 kg.

Definitions include:

  • low birth weight, LBW, less than 2.5 kg
  • very low birth weight, VLBW, between 1.0 and 1.5 kg
  • extremely low birth weight, ELBW, up to 1.0 kg

These terms refer to the weight at birth irrespective of the gestational age.


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