They just found out that the average couple is fertile for only about 6-7 days each month. For some women, it is really easy to get pregnant, whereas others may have to try many times until they can have a baby. This is related to many things, such as whether the couple is having relations when the woman is ovulating, and such.
Learning about the different body parts will help us better understand human life and health because it can make us care about others instead of just are selves and encourage us to do something about the health difficulties in life.
