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How Long Does the Depo Provera Shot Last?

Wednesday, July 15, 2009
Related Tags: provera | depo | shot | pregnancy | menses
 

Instructions

How it Works

  • Step 1:
    According to the Family Doctor website, the Depo Provera shot works by preventing ovulation. If an egg is not released, pregnancy cannot occur.

Time Frame

  • Step 1:
    In order to be effective, the Depo Provera shot must be given within the first five days of a woman's menstrual cycle. If you wait to get the shot, a pregnancy test must be done before getting the injection.

Length of Protection

  • Step 1:
    The Depo Provera shot is effective against pregnancy for 12 weeks. The shot must be repeated at 12-week cycles to maintain protection against pregnancy.

Side Effects

  • Step 1:
    According to Planned Parenthood, some side effects include menstrual irregularities or lack of menses, abdominal pain, weight changes, dizziness and headache. Heavy bleeding or severe abdominal pain should be reported to your doctor.

Risks

  • Step 1:
    Depo Provera does not protect against HIV or sexually transmitted diseases. A condom should be used to protect against disease.

Warning

  • Step 1:
    Long-term use of Depo Provera can cause loss of bone mineral density. According to the Rx List website, Depo Provera should not be used for longer than two years unless no other suitable birth control choice is available.

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