To delay a period Provera should be taken for 10 to 14 days starting 3 days before period due. The usual dose is 5 to 10mg daily. You should get your period a few days after finishing the Provera. Patient Information About depo-subQ provera 104™ medroxyprogesterone acetate injectable suspension 104 mg/0.65 mL WHAT IS THE MOST IMPORTANT INFORMATION I SHOULD Depo-Provera can cause irregular bleeding and other side effects. Irregular bleeding. The most common side effect of the birth control shot is irregular bleeding. Depo-Provera is a hormone (progestin) that is injected by a health care professional into the woman's buttocks or arm muscle every three months (pregnancy prevention begins 24 hours after injection). There are a number of reasons why you may want to skip your period. It’s generally safe to do so if you’re on birth control pills. However, it’s best to check with your doctor first. I don't ovulate often or get my period very much, so my fertility specialist RN person put me on progesterone for 10 days to induce menstration before starting Clomid. I stopped on Friday, and it is now Monday night and no sign of a period. Does anyone know how long after the progesterone the period Depo-Provera CI can pose an additional risk in patients with risk factors for osteoporosis (e.g., metabolic bone disease, chronic alcohol and/or tobacco use, anorexia nervosa, strong depo provera package insert family history of osteoporosis or chronic use of drugs that can reduce bone mass such as anticonvulsants or corticosteroids). I had a 21 day progesterone labs done March 21st which confirmed negative for ovulation. My period in April was late so I again had labs done to confirm negative pregnancy on April 5 and started Provera on April 8th 10mg X7 days. Medroxyprogesterone acetate (MPA), also known as depot medroxyprogesterone acetate (DMPA) and sold under the brand name Depo-Provera among others, is a hormonal medication of the progestin type. While people have responded way sooner, I just want to say yes, this is normal. I was on my period when I got my shot. granted, it didn't stop the same day, but it ended sooner than it should have, although I did have spotting the next month after, and then never again since.