Wade M E, McCarthy P, Braunstein G D, Abernathy J R, Suchindran C M, Harris G S, Danzer H C, Uricchio W A
Am J Obstet Gynecol. 1981 Oct 15;141(4):368-76. doi: 10.1016/0002-9378(81)90597-4.
The final results of a prospective comparative study of two methods of natural family planning indicate a significant difference in the 12 month net cumulative pregnancy rates between the ovulation and symptothermal methods. These differences are on the order of two to one in favor of the symptothermal method. Pearl pregnancy rates confirm similar differentials between the two methods. Dropout rates for both methods were high. Lack of interest or dissatisfaction with the method was the major reason for dropout training while pregnancy or desire for pregnancy were the major reasons for dropout during the formal phase of the study.
一项关于两种自然计划生育方法的前瞻性比较研究的最终结果表明，排卵法和症状体温法在12个月的净累积妊娠率上存在显著差异。这些差异大约为二比一，有利于症状体温法。佩尔妊娠率证实了两种方法之间存在类似的差异。两种方法的退出率都很高。对方法缺乏兴趣或不满意是培训阶段退出的主要原因，而怀孕或渴望怀孕是研究正式阶段退出的主要原因。
