fertility decline meaning in Chinese

生育率下降

Older women may find it harder to get pregnant than younger women because fertility declines with age
比起年轻的女人，年纪比较大的女人更难受孕，因为随着年龄的增长，怀孕率下降。
Many women are choosing to hae children later in life . and because fertility declines with age , delaying pregnancy also means that many couples will experience infertility
许多女性选择晚育。因为随年龄生育率降低，推迟怀孕也意味着许多夫妇将会面临不育。
The approximate trend of the change of soil in the plantations of four species is that soil fertility declined slightly from 1993 to 1995 , and rose a little from 1995 to 1997
4种人工林土壤变化的大致趋势是： 1993 - 1995年肥力大多略呈下降趋势， 1995 - 1997年有所上升。
Fertility declines rapidly after the age of 35 but surveys report a growing number of women wanting to wait until their 40s to have their last child
报道说，女性的生育能力会在35岁之后急剧下降，但相关调查却显示，英国目前有越来越多的妇女选择40岁时才会生最后一胎。