13 i.e., before 37 weeks of pregnancy, the birth is considered preterm or premature. So, in terms of days, it means that the baby is born less than 259 days after the first day of your LMP. How are babies categorized based on their birth weight? Newborns weighing between 2.5 and 3.99 kg are considered to have a normal birth weight (BW). However, there can be considerable variations among different ethnic communities and groups. According to their birth weights, babies can have: < 2.5 kg < 1.5 kg < 1 kg
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