器械避孕是人为的一种方法,使精虫和卵子不能相结合成胎。用这种方法就可以适当的安排生育孩子的计划。避孕的方法很多,使用阴道隔膜(俗称子宫帽)为有效方法之一。阴道隔膜有大小不同的号码,从50号起一直到85号以上(最常用的号数是65、70和75号即直径为6.5、7.0和7.5厘米者),故应根据阴道的具体情况,由医生帮助避孕者检查确定应使用的隔膜号数。为此,当给避孕者试用隔膜以前,须先用食指及中 Contraceptive device is a man-made method, so sperm and egg can not be combined into a tire. In this way we can arrange the childbirth plan properly. Contraceptive methods are many, the use of the vaginal diaphragm (commonly known as the uterine cap) is one of the effective methods. Vaginal diaphragm size of different numbers, starting from the 50th until more than 85 (the most commonly used number is 65, 70 and 75, that is 6.5, 7.0 and 7.5 cm in diameter), it should be based on the specific circumstances of the vagina, The doctor helps the contraception check to determine the number of diaphragms to be used. To this end, when contraceptives to the trial before the diaphragm, must first use the index finger and the middle