[Induced labor for gravidae with low Bishop's scores (with report of 242 cases)]

In planned/selective delivery, gravidae with Bishop's score 5 or below 5 are deal with lower position water sac, the aim of which is to induce regular uterine contraction and complete physiological latent period of cervical dilation. From Oct 1986 to Dec 1988, 242 cases of primiparae by this method and the latent period in physiological limit. This is a great breakthrough in induced labour for gravidae with low Bishop's scores. We found that this method is simple, effective, safe, and economic. It not only alleviates pain of the gravidae, but also helps to prevent the rise of caesarean section rate.