TEHRAN, Iran (AP) — Iranian lawmakers approved a bill Tuesday criminalizing birth-control surgeries amid a drop in the country’s population, the semi-official ISNA news agency reported.

The agency said 106 lawmakers out of 207 voted for the bill, which would imprison those convicted of performing vasectomies and tubal ligations for two to five years. Opponent of the bill warn that it could lead to Iranians seeking underground medical care that could be dangerous.