Generally, it takes between seven and 10 hours for a dog to digest food, but the many variables mean that only your vet can tell you how long it should be taking.
But how many days after Provera will your period start? When using Provera for amenorrhea (absence of menstrual periods) or abnormal vaginal bleeding, the medication is taken for 5 to 10 days. Menstrual-like vaginal bleeding usually occurs three to seven days after treatment ends.
You can become pregnant as soon as 3 to 4 months after your last shot. But it takes some women up to a year or 2 to conceive after they stop using this type of birth control. This time frame seems unrelated to how long you used the shot.ow Soon Does It Work? Depo-Provera starts to work as birth control immediately after the first shot, if you get it within the first 5 days of your menstrual period.