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子宫颈内口松弛（ｒｅｌａｘａｔｉｏｎｏｆｔｈｅｉｎｔｅｒｎｕｍｏｆｕｔｅｒｉｎｅｃｅｒｖｉｘ）是导致妊娠中期习惯性流产及早产的主要原因之一。１９８７年１月至１９９６年１２月我们用改良式宫颈阴道粘膜下“Ｕ”形环扎术（ｒｉｎｇｆｏｒｍｌｉｇａｔｉｏｎ）治...
Relaxation of the cervix (relaxationoftheinternumofuterinecervix) is one of the main causes of habitual abortion and premature delivery in the second trimester. January 1987 to December 1996 we use a modified cervical vaginal submucosal “U” shaped ring (ringformligation) treatment ...