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为了证明子宫的伸张与羊水PGF的水平、宫颈的软化、分娩开始和进展间有一定的关系,对7名足月妊娠但子宫颈不成熟,无产兆的妇女进行实验研究.她们均无显著合并症,胎儿为头先露,孕39-41周.从胎儿大小及妊娠时间明确肯定胎儿完全成熟.阴道消毒后,安放一个产科用橡皮球到宫颈内口以上,注入150～250ml灭菌水使其膨胀后夹住出口以防液体流出.用压力计记录子宫活动情况.橡皮球从子宫自然排出时做为分娩开始,记录宫颈的软度及扩张情况.在橡皮球安放前及球排出后宫颈扩张3～4cm、5～6cm和9～10cm时,分别取5ml羊水样品,并立即离心,存放在-20℃冰箱中.
To demonstrate the relationship between uterine extension and the level of amniotic fluid PGF, cervical softening, and the onset and progress of labor, seven women with full-term gestational but immature cervix and no evidence of ailment were studied. Fetus for the first forerunner, 39-41 weeks of pregnancy.From the fetus size and pregnancy time clearly affirmed the fetus is fully mature.After vaginal disinfection, place an obstetric use rubber ball to the cervix within the mouth, inject 150 ~ 250ml sterile water to make Its expansion after clamping the outlet to prevent liquid outflow.With a pressure gauge to record uterine activity.The rubber ball from the uterus spontaneous discharge as the beginning of childbirth, recording the softness and expansion of the cervix in rubber ball placed before the ball and after discharge of the cervix Expand 3 ~ 4cm, 5 ~ 6cm and 9 ~ 10cm, respectively, take 5ml of amniotic fluid samples, and immediately centrifuged, stored in a -20 ℃ refrigerator.