from age 13 to 6 years; Shortening the fertility period of Iranian women by 8 decades.
Examining the fertility behavior of different generations of Iranian women shows that the average age gap between the first and last child decreased from 13 years for women born in 1,325 to 6 years for women born in 1,365; While the average age of mothers at the time of registering their first child experienced more limited changes.