fertility decline造句怎么写

Many women are choosing to have children later in life. And because fertility declines with age, delaying pregnancy also means that many couples will experience infertility.

Recently, aiming at the reasons causing water and soil losses and fertility decline on the red soil drought farmland in Yunnan Province, the research and analysis have been carried out.

This fertility decline has meant dramatic reductions in the risks of childbirth while freeing up women to enter the labor force.

Populations can rise while fertility declines because of inertia, which matters a lot in demography.