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.
And if you do not ovulate then it's unlikely that you have regular menstrual cycles and periods. Depo-Provera prevents ovulation for a long time after the injection, up to 6-9 months. Unless you were taking Depo-Provera, your cycles should return to normal within two or three months.