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Ｂ超检测１６４８人宫内节育器浅析张青莲１王翠莲２吉宝珍２随着计划生育的开展，宫内置节育器已成为计划生育工作中稳定措施之一。由于其避孕效果可靠，被大多数育龄妇女接受。而定期复环能及时了解环在宫内位置改变情况。对减少置环受孕和降低脱环率起到一定作用。而Ｂ...
B-test 1648 IUD Zhang Qinglian 1 Cui Lianlian 2 Kebao Jane 2 With the advent of family planning, intrauterine device has become one of the stability measures in family planning work. Because of its contraceptive effect, it is accepted by most women of childbearing age. The regular ring can be timely understanding of the ring changes in the position of the palace. To reduce the ring conception pregnancy and reduce the rate of play a role. And B ...