滞产（prolonged labor）：总产程超过24小时。以上8种产程进展异常，可以单独存在，也可以合并存在。
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是指产程进展不顺利而有产程延长(Prolonged Labor) 或产程不进步 ( Failure to Progress ) 的现象。
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asphyxia from prolonged labor 久产不下而窒息
prolonged latent phase of labor 临产潜伏期延长
prolonged second stage of labor 第二产程延长
Prolonged latent phase labor 临产潜伏期延长
prolonged first stage of labor 第一产程延长
Prolonged second stage (of labor) 第二期(产程)延长
·2,447,543篇论文数据，部分数据来源于NoteExpress
Bleeding of cesarean section is usually due to uterus atone, placental factors, prolonged labor and lacerated section.
剖宫产出血的主要原因是宫缩乏力、胎盘因素、产程延长及切口撕裂等。
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In addition, young mothers face terrible threats to their health such as fistula -- a hole in the birth canal caused by prolonged labor without prompt medical intervention.
CNN: Africa's birth rate: 'Why women must be free to choose'
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