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特許 権利維持 Rupture of membranes (ROM) or amniorrhexis is a term used during pregnancy to describe a rupture of the amniotic sac.[1] Normally, it occurs spontaneously at full term either during or at the beginning of labor. Rupture of the membranes is known colloquially as "breaking the water." A premature rupture of membranes (PROM) is a rupture of the amnion that occurs prior to the onset of labor.
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