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How soon after the first Depo-Provera injection can a woman have unprotected sex? #112/11

If they tell you to wait 7 days before you have unprotected sex and you have sex 3 days after you received your first injection, can a blood test tell if you are pregnant?

If the first shot of Depo was within 7 days after the start of a menstrual period, no additional contraceptive is needed and you were protected when you had sex just 3 days after the first shot of Depo.


If your first shot was given more than 7 days after the start of a period, it is then that a woman should use additional contraception or abstinence for 7 days.  If this was the case FOR YOU, then a pregnancy test would be expected to be positive about 14 days after the intercourse.


A serum or blood pregnancy test is NOT recommended or necessary. You can depend on a sensitive urine pregnancy test to provide an accurate result.


Good luck!

How are you today, January 31, 2011?  Was your pregnancy test negative?


To learn more about the advantages and disadvantages of Depo-Provera injections, go to our website: www.managingcontraception.com and click on Choices.  You can also order this wonderful new educational book from our website or by calling 404-875-5001.  Do you have your copy yet?  



Key Words: unprotected sex, Depo-Provera injections, blood test, pregnant, menstrual period, additional contraceptive, period, abstinence, positive, serum, blood pregnancy test, unnecessary, sensitive urine pregnancy test, accurate

Posted 1-23-2011, Updated 1-31-2011


Robert A. Hatcher MD, MPH
Emeritus Professor of Gynecology and Obstetrics
Emory University School of Medicine
Atlanta, GA

The directors and owners of this website and any publications and information concerning health matters offered here advise a person with a particular problem to consult a primary-care clinician or a specialist in obstetrics, gynecology, or urology (depending on the problem or the contraceptive) as well as the product package insert and other references before diagnosing, managing, or treating the problem.
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