自1958年我国报导吸引流产术后，目前已在国内外普遍推广，并一致认为它是早期人工流产中最简便的方法。至于中期妊娠引产，则尚无公认的简便安全方法。早在1960年，全国各地有采用利凡诺胎膜外宫腔 Since the publication of abortion in our country in 1958, it has been widely promoted both at home and abroad and it is unanimously considered to be the easiest method in early abortion. As for mid-term pregnancy induction, there is no accepted method of easy and safe. As early as 1960, levofino fetal membranes were applied throughout the country