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.
I have been taking Medroxyprogesterone (Provera) for 11 months now to induce my period each month. I take 10mg days 16-26 each month. I usually get my period 2-5 days after i stop the medicine. This month however, its day 11 and still no period.