Leridon Henri
Institut national d'études démographiques, 75980 Paris cedex 20, France.
Popul Stud (Camb). 2008 Mar;62(1):15-24. doi: 10.1080/00324720701804207.
The proportion of couples permanently sterile beyond a certain age is an important component of the reproductive process. Unless medical assistance is used, this age is the upper bound of the fecund period. Most estimates of sterility by age of the woman have been derived from natural fertility populations, in which the number of births and the timing of the last birth (of the complete reproductive history) were not controlled by the couples. Because data on these populations do not include pregnancies not ending in a live birth, the sterility estimates apply to the proportion of couples unable to conceive and to have a live birth. For this reason, it is useful to have an estimate of sterility based on the risk of conceiving, independently of the fate of the pregnancy. Using this new estimate, sterility increases with age much more slowly than with most previous estimates.
超过一定年龄后永久不育的夫妇比例是生殖过程的一个重要组成部分。除非借助医疗手段，这个年龄就是生育期的上限。大多数关于女性不育率的估计是基于自然生育人群得出的，在这类人群中，生育数量和最后一次生育的时间（在完整的生殖史中）并非由夫妇控制。由于这些人群的数据不包括未以活产告终的妊娠情况，所以不育率估计适用于无法受孕并生育活产婴儿的夫妇比例。因此，基于受孕风险独立于妊娠结局来估计不育率是很有用的。使用这种新的估计方法，不育率随年龄增长的速度比大多数先前的估计要慢得多。
