Premature birth - Symptoms and causes - Mayo Clinic
https://www.mayoclinic.org/diseases-conditions
WebMar 22, 2024 · A premature birth means a baby is born too early. The birth takes place before the 37th week of pregnancy. A typical pregnancy lasts about 40 weeks. Premature babies often have serious health problems, especially when they're born very early. These problems often vary.
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