Wade M E, McCarthy P, Abernathy J R, Harris G S, Danzer H C, Uricchio W A
Am J Obstet Gynecol. 1979 Jul 15;134(6):628-31. doi: 10.1016/0002-9378(79)90642-2.
Data accumulated to date from the Los Angeles study indicate that the total termination rate for 12 months from the beginning of the training period and from formal entry into the study was high for the ovulation method (OM), and symptothermal method (STM). Voluntary withdrawal was the highest single reason for termination in both methods. The 12 month voluntary withdrawal rate, measured from formal entry into the study, was significantly higher for OM users. Pregnancy rates measured from both the beginning of training and formal entry into the study were significantly higher for OM users than for STM users. Complete analysis of the data collected during the study is currently in progress. It is anticipated that some of the causes for the differences in pregnancy rates and withdrawal rates between the two methods can be identified.
洛杉矶研究迄今积累的数据表明，从训练期开始到正式进入研究的12个月内，排卵法（OM）和症状体温法（STM）的总终止率很高。自愿退出是两种方法中终止的最主要单一原因。从正式进入研究开始计算的12个月自愿退出率，OM使用者显著更高。从训练开始和正式进入研究时计算的妊娠率，OM使用者均显著高于STM使用者。目前正在对研究期间收集的数据进行全面分析。预计可以找出两种方法在妊娠率和退出率上存在差异的一些原因。
