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From October 1964 through June 1973, during the period of 8 years and 9 months, 44 times of operations were carried out in 33 patients of incompetence of the cervix which was diagnosed on the bases of previous obstetric histories, findings on the cervix in pregnant or nonpregnant state and its combinations with consideration of predisposing traumatic factors. A number of operations, such as Shirodkar(19 times), Mc-Donald(20times) and Lash & Lash(5 times) had been done and a variety of suture materials used. Before operation those 33 patients had 182 conceptions with successful outcome of pregnancy in 23. If the artificial abortions were deleted, fetal salvage had occurred in 16.5%. Fourty operations had been followed up to deliveries with 28 successful pregnancies and a overall operative successful fetal salvage rate was 70%. Fourty four pregnancies had been follwed up to deliveries and 30 pregnancies resulted in success with a overall fetal salvage rate of 68.1% whicg was success rate regarding to the numbers of pregnancies after operations. An attempt to analyze the incidence, predisposing etiological factors, post-operative complications, comparative results of each operation and other concerned problems was made with a brief review of literateres.
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