Medical Questions > Womens Health > Birth Control Forum

Depo-provera shot : how long before it is effective ?

Must Read
Birth control is helpful in preventing pregnancy. Need to know more about birth control? Start here to learn more about popular methods of birth control....
You have many birth control options. Each works differently. What are the choices and what should you consider in order to help you make your decision? ...
Each method of birth control comes with risks to your health. What are the general problems you could encounter?...
User Profile
After you get the depropravara shot, how long before it is affective? I heard 24hrs and up to 4 weeks????

Did you find this post helpful?

User Profile
replied June 6th, 2007
Birth Control Answer A2857
Depo-provera is a hormone injection that lasts for three months to prevent pregnancy. The first shot of depo-provera is usually given during or few days after the start of a menstrual period. After 24 hours, the shot is effective birth control for the next 13 weeks.

Did you find this post helpful?
This question has been answered by the doctor. This topic is now open for public discussion, however no comments below this point will be answered by a doctor.
Quick Reply
DISCLAIMER: "Ask a Doctor" questions are answered by certified physicians and other medical professionals. For more information about experts participating in the "Ask a Doctor" Network, please visit our medical experts page. You may also visit our Birth Control , for moderated patient to patient support and information.

The information provided on eHealth Forum is designed to improve, not replace, the relationship between a patient and his/her own physician. Personal consultation(s) with a qualified medical professional is the proper means for diagnosing any medical condition.