Quote:
Originally posted by
aliceinthehole
your first statement is untrue.
Plan B CAN work within 72 hours. and the sooner you get it, the highger your chances it will work... there's no 'working better' or 'working not as well...' for Plan B. it either
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your first statement is untrue.
Plan B CAN work within 72 hours. and the sooner you get it, the highger your chances it will work... there's no 'working better' or 'working not as well...' for Plan B. it either stops the sperm from fertilizing the egg, or it doesn't.
the sooner you get it, the better your chances of not getting pregnant.
less
actually, the first thing Plan B does is to try to
stop ovulation completely. Taking it asap after the unprotected sex
will be more likely to stop ovulation than to resort to the second effect which is to cause a "hostile environment for implantation" in the uterus, IF an egg does get matured, and then fertilized.
It doesn't prevent sperm from doing
anything. They still do what they do, swim around looking for an egg. Plan B has no effect whatsoever on sperm.
Simply stopping ovulation usually results not only in few or no cramps, but also no "Ooops, fertilized egg" to deal with. Of course, if you've already ovulated, it will cause the uterine lining to become "hostile" to implantation. As pregnancy cannot occur without implantation you simply aren't pregnant until the fertilized egg is implanted, Plan B and its generic can never cause abortion. Abortion can ONLY take place after a fertilized egg is implanted, which can take anywhere from 3 days to 2 weeks after insemination. Averaging at about 7 to 10 days. Plan B can't do anything about an implanted fertilized egg. It's too late, then. As this can happen in as little as 3 days, (more commonly longer) you do need to take the pills quickly. Also, it's easier if you're only preventing ovulation, but usually you have no idea what happened. You just don't get pregnant.
But, all these effect work "better" the sooner it is taken. After 72 hours, it may not work at all. As you
conceivably (sorry) get actually pregnant at 4 days, (although rare) and you
may have ovulated the day you had the intercourse, taking it as soon after the intercourse really does make it more likely to work.
For instance, if you ovulated on the DAY you had the unprotected intercourse, and waited 2 or 3 days to take the Plan B and for some reason the fertilized egg DID implant while you were waiting, the Plan B will do NOTHING to an implanted egg. Also, it works better at preventing ovulation than "making the uterus hostile" after ovulation, so taking it sooner actually does cause more efficacy in most cases.