thread: How does Mirena work??

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  1. #2
    Registered User

    Feb 2007
    In the jungle.
    4,809

    It works in the same way the mini pill does, however the dose of progesterone is not systemic but rather local to the uterus. So an egg could still be fertilised but not implant as there is no lining on the uterus due to the secretion of the hormone..
    Last edited by Junglemum; October 22nd, 2009 at 09:19 PM. : taking out irrelevent comments. :)