初婚夫妇自然受孕力及影响因素的研究

Natural Fecundity among Newly Married Couples and Influenced Factors

８０年代末上海市区７８２６对初婚夫妇的前瞻性随访显示，领证夫妇开始每周有性生活后一年时，９２％的未避孕者及９０％的曾避孕者已首次受孕。７６％的未避孕及８６％的曾避孕夫妇于三个月内即受孕。以领证为起点估计上海市区夫妇婚后一年的受孕力为８３％，而如以夫妇开始每周性生活为起点，则９２％的初婚夫妇于婚后一年时已受孕。比例风险模型显示除夫妇婚龄及妻子毒物接触史等生物性因素外，夫妇生育意愿、同胞数、排行、工作单位所有制、个性及性生活状况等均在不同程度上影响夫妇的自然受孕力。

A prospective cohort study with 7, 826 newlyweds who registered from 1987 to 1988 in two defined marriage offices at Shanghai Municipality was carried out for fifteen months after their weddings , It was shown that 92 %of non-contracepting and 90% of ever - contracepting wives have been conceived at the time of one year after initiating their regular sexual life. Among couples who had been conceived, 76% of non - contracepting and 86% of ever - contracepting wives conceived within three months after initiating their regular sex, By using the life table method, it was estimated that 83% of wives conceived at the time of one year after their registrations and 92% of wive were to be so at the time of one yeat after initiating their regular sex. By fitting the Proportional Hazard Model, it was shown that besides some biological factors, e. g. Couple's age at mattiage and the contacting status with occupational poisonous materials for wives, which influenced wife's natural fecundity, couple's demographic characteristics childbearing intentions, personality traits and sexual life status etc, could also influence couple's natural fecundity in some extent.