Establishing a normal curve for time to pregnancy

• Main Authors: Huang Wen-Yu, 黃文郁
• Other Authors: 陳保中
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/71377117904584887766

碩士 === 國立臺灣大學 === 職業醫學與工業衛生研究所 === 87 === Object： To construct the reference curve of fecundibility in term of waiting time to pregnancy in the general population of Taiwan. Methods：This study was a retrospective study. We used data from a marriage cohort of the infertility of Taiwan conducted by Institute of Taiwan family planning in 1996. The population included 9143 couples spread in Taiwan and married in April,1990. We sampled 601 couples and interviewed them using a structured questionnaire . We visited 408 couples from 1998 to 1999. 241 women (59%) completed interviews and 588 pregnancies were analysed with Cox regression model . Women were categorized and analysed according to their waiting time to pregnancy which was defined at least one month and above. The analysis excluded the pregnancies delivered more than 14 years ago to reduce recall bias, and those without the information of time to pregnancy. Result: Compared with the waiting time which women tried to conceived before each pregnancy, the cumulative percent was 56% in 3 months, 75.9% in 6 months, 81.8% in 9 months, and 89.8 % in one year. 10.2% pregnancies in total were not conceived before one year, and the waiting time to conception before each pregnancy of the women in Taiwan was similar with the published data in Asian and European countries. Conclusions: The fecundibilty curve of time to pregnancy in Taiwan general population can be used to estimate the risk of subfecundibility of specific occupational exposures. And it can also be used to compare the fecundibility with other races or countries.