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.
2 doctors agreed: Up to 18 months: Depo-provera is intended to prevent pregnancy for 3 months after each injection. However, it may take up to a year and a half (18 months) for it to be completely gone. Until the body metabolizes the depo-provera completely the menstrual cycle may not resume. ...Read more.