The Depo-Provera shot's effect lasts up to 18 months and is not recommended for individuals planning to conceive within 1.5 to 2 years.

“so I will see people who liked that option for contraception and now they haven't had a period in a long time but their last Deo shot was 6 months ago and they're all frustrated by the fact when I tell them well you still may not have another period for a year plus because this high level of progesterone that you've already injected into your system can last a substantial amount of time so that is a contraceptive option that I tell people to discontinue a year and a half to two years before they want to get pregnant”