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Hope you are doing good. Change in the menstrual cycle is the most common side effect of Depo Provera
. You may experience irregular bleeding or spotting. After a year of use, about 50% of women will stop getting their periods. Their periods usually return when they discontinue the shots.
With Depo-Provera, you could become pregnant as soon as three to four months after your last shot. However, it may take some women up to a year or two to conceive after they stop using this type of birth control. This time frame seems unrelated to how long you had been using Depo-Provera.
Ovulation is when the egg is ejected from the ovary. If you miss your period and you know if and when ovulation happened then there are only 2 possibilities:
You are not pregnant and your period comes 15 or so days later
You are pregnant and your period does not come 15+ days later
I hope have answered your Query. Feel free to ask if you have any Query. Wish you good Health. Regards