第二产程又称胎儿娩出期,指从宫颈口开全到胎儿娩出。初产妇约需1-2h,经产妇数分钟,少数可达1h。第二产程初产妇超过2h,经产妇超过1h者称“第二产程延长”。文献报道,第二产程延长导致器械助产率等增加[1],导致胎儿在盆底受压、缺氧,产妇 The second stage of labor, also known as fetal delivery period, refers to the cervix open to the fetus delivered. First primipara about 1-2h, the maternal number of minutes, a few up to 1h. The second stage of labor primipara more than 2h, the maternal more than 1h said “second stage of extension ”. Reported in the literature, the extension of the second stage of labor led to an increase in the rate of equipment such as midwifery [1], resulting in fetal pelvic floor compression, hypoxia, maternal