It is usually recommended that you wait until six weeks after the birth to start the contraceptive injection because you may get heavy and irregular bleeding, but it is possible to use this earlier if there are no other alternatives you find acceptable.
Two of the best contraceptive injections are Progestin injections. Depo-Provera lasts for 12 weeks and Noristerat acts for eight weeks. Although this is the time-frame that is completely covered from a contraceptive point of view, some women could take months to return to regular periods and regular fertility, and as long on 12 months and more. Obviously this is not a good method if you may be interested in reversing its action in the shorter term.
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