Pregnancy is considered prolonged or postdates when it exceeds 294 days or 42 weeks from the first day of the last menstrual period (LMP).

 
  • 從末次月經(jīng)第一日計算,停經(jīng)時(shí)間超過(guò)294天,即42周時(shí)被認為妊娠延長(cháng)或過(guò)期。
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