Usually, high religious observance and low income go along with high birthrates. But, according to the United States Census Bureau, Iran now has a similar birth rate to New England — which is the least fertile region in the U.S.
The speed of the change is breathtaking. A woman in Oman today has 5.6 fewer babies than a woman in Oman 30 years ago. Morocco, Syria and Saudi Arabia have seen fertility-rate declines of nearly 60 percent, and in Iran it’s more than 70 percent. These are among the fastest declines in recorded history.