The time interval between the birth of the first and last child of Iranian women has been halved.
Examining the pattern of having children for different generations of Iranian women shows that the age gap between the birth of the first and last child increased from 13 years among women born in 1,325 to 6 years among women born in 1,365.
On the other hand, the average age of the mothers at the birth of their first child underwent more limited changes.