One important point to note, since part of the discussion is now focusing on implantation, is that the primary function of Plan B is prevention of fertilization. It can prevent implantation, but that is not its primary function, just as, for example, dutasteride prevents hair loss by reducing DHT levels, but is designed for the purpose of treating prostate disease.
Fertilization takes a day or two at a minimum and can take longer than that. If the Plan B is takn in that time, it effectively prevents fertilization. Preventing implantation, and thus preventing the pregnancy in the first place, is a secondary effect, just as with birth control pills, which function in much the same way.
Gilda
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Last edited by Gilda; 08-27-2006 at 09:16 AM..
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