The Depo-Provera shot (depo shot) provides contraceptive protection immediately if given within the first 5-7 days of your menstrual cycle.
Timing by Cycle Day
If administered in the first 5 days of your period, it works right away, with no need for backup birth control. Beyond that window—such as days 6-7 or later—use backup methods like condoms for 7 days until full effectiveness kicks in.
Repeat Doses
Subsequent shots every 12-13 weeks maintain protection if given on time, but delays over 2 weeks require backup contraception and possibly a pregnancy test. Always consult a healthcare provider for personalized timing based on your cycle and health history.