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.
Depo-Provera can affect fertility for several months. It depends on how long you were on it and even then every woman is different. Most women are able to get pregnant in the year following the cessation of their injections. Some can become pregnant right away and some it takes up to 18 months. You do not have to have regular periods to get pregnant.