I'd make it an option, but forcing a non emergency medical treatment on anyone gives me the willies.
Now, making them sign a pledge to not get preggo (or impregnate someone, must be fair) or face cutting of benefits/losing the kid, that would be something I could go along with.
The only way someone wouldn't get pregnant is if they didn't have sex, and you cannot tell a person they can't have sex.
Depo is 99% effective.
Depo-Provera (Birth Control Shot) Effectiveness, Risks, & More
Yeah but Marty said it should only be an option, so what about those who refuse it?