natural 1., normal 1

An easy 1.; one in which the head presents, and the delivery is completed without artificial aid, without injury to mother or child, or any complication, and, according to some authors, within the space of twenty-four hours, obstructed 1. L. in which progre is impeded by some mechanical obstruction, precipitate 1. L. of very short duration, premature 1. L. considerably before term, but when gestation is sufficiently advanced for the child to be viable, particularly between the 1 80th and the 270th days, protracted 1. L. occupying more than the usual time (from 10 to 20 hours in primiparae, from 2 to 6 hours in multiparae). spontaneous 1. L. occurring or completed without artificial aid. twin 1. L. with