Question: how long does birth control shot last after you stop taking it?
Answer: Keep in mind that each Depo Provera injection lasts about three months, so you will need to plan ahead if you want to get pregnant after stopping Depo Provera. It takes an average of 9 to 10 months,2﻿ and for a small minority of women up to 18 months, to regain fertility and begin ovulating after stopping Depo Provera.