i have never really known anything about
it? does it delay periods? does it make
you miss your period?
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Ingi
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Joined: 09 Mar 2006 Posts: 8884 Location: Grinning like a Cheshire Cat,
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Posted: 01-31-08 23:02pm
It can. What Plan B does, is it prevents
ovulation. But it also makes your uterus a
hostile environment if you have already
ovulated. Since it is a massive dose of
hormones, it can cause your period to be
delayed.
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LadyAllie
Experienced User , Rather EHEALTHy
Joined: 08 Jan 2008 Posts: 104 Location: ,
to Ingi Posted: 01-31-08 23:17pm
my bf wants me to take plan b because we
had unprotected anal and im not on the
pill. (im supposed to start nuvaring when
i get my period, which was supposed to be
2 days ago)
i wouldnt let him finish without a condom,
so he put one on and then finished in my
vagina. durring the anal his penis slipped
down and touched my vagina once or twice,
but no penetration or anything. idk im
worried that i havent gotten my period
yet, but i dont know about taking the plan
b. i think it would make me really sick,
because i couldnt handle the pill. it made
me sick super to my stomach after 2 days.
what do you think i should do?
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Verizon-y
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Joined: 29 Aug 2007 Posts: 3291
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Posted: 01-31-08 23:37pm
Ingi
wrote:
It can. What Plan B does, is
it prevents ovulation. But it also makes
your uterus a hostile environment if you
have already ovulated. Since it is a
massive dose of hormones, it can cause
your period to be
delayed.
It does not cause the uterus to be a
hostile environment. It actually does the
opposite. Plan B is the hormone
progesterone , which is the same hormone
fertility clinics give women to maintain
the uterine lining for keeping a
pregnancy.
The ovary contains a supply of eggs. One
egg each month begins to ripen and mature
into a large structure called a follicle,
regulated by a hormone from the pituitary
called Follicle Stimulating Hormone, FSH.
The follicle is going to produce estrogen,
which is what causes the growth of the
uterine lining. FSH is particularly
important early in the cycle.
A second pituitary hormone, Luteinizing
Hormone, (LH) assists in stimulating the
mature follicle, and in particular, a
rapid surge in LH is what triggers the
follicle to pop, releasing the egg, in a
process called ovulation. This is a key
step, so remember this: a spike in LH
levels triggers ovulation.
After ovulation, the egg goes on its way,
and might be fertilized, leading to
pregnancy. The follicle left behind isn't
done yet, though; it becomes a structure
called the corpus luteum, which continues
to produce estrogen (necessary to maintain
the uterine lining), and also gradually
produces more and more progesterone. Progesterone
helps maintain the uterine lining, (This
is why women undergoing fertility
treatment are sometimes given progesterone
to help maintain the pregnancy}. but also
suppresses LH production by the
pituitary. It's a kind of timer.
The corpus luteum is maintained by the
levels of LH, but the corpus luteum also
produces rising levels of progesterone,
which shut off LH…and when too little LH
is produced, the corpus luteum shuts down,
no estrogen and progesterone are produced,
the uterine lining is no longer
maintained, and a woman finds a bloody
mess in her panties.
The key
thing to remember about this part, though,
is that progesterone suppresses
LH.
Put two pieces of the story together: a
spike in LH levels triggers ovulation and
progesterone suppresses LH. Hmmm. This
suggests an idea. If you wanted to prevent
ovulation, how would you do it?
(Consider this a test. Imagine that
Jeopardy jingle playing right now.)
Time's up—I bet everyone came up with
the right answer, though. Giving someone a
large dose of progesterone would shut down
LH production, so there would be no
ovulation, so no egg would be released,
and any sperm happening to be in the
woman's reproductive tract would find
nothing to fertilize.
You have just figured out what is called
Plan B contraception. It is a form of
birth control that tells the woman's
ovaries to hold off on releasing any eggs
for a short while. It's called emergency
contraception, because it is used by a
woman who has, for whatever reason (rape,
a broken condom, misplaced enthusiasm,
second thoughts, anything) had unwanted
sperm in her reproductive tract, and she
wants to make sure that this isn't the
moment her ovaries happen to pop a
follicle.
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Verizon-y
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Posted: 01-31-08 23:44pm
LadyAllie
wrote:
my bf wants me to take plan
b because we had unprotected anal and im
not on the pill. (im supposed to start
nuvaring when i get my period, which was
supposed to be 2 days ago)
i wouldnt let him finish without a condom,
so he put one on and then finished in my
vagina. durring the anal his penis slipped
down and touched my vagina once or twice,
but no penetration or anything. idk im
worried that i havent gotten my period
yet, but i dont know about taking the plan
b. i think it would make me really sick,
because i couldnt handle the pill. it made
me sick super to my stomach after 2 days.
what do you think i should
do?
First of all, Plan B only works up to 5
days after unprotected sex, so how long
ago did this occur?
If the pills that made you sick were
progesterone-only birth control pills,
Plan B may react the same way with your
system, since Plan B is the exact same
thing, only a higher dose. I was the same
way on the pill as you, I couldn't stand
the nausea, etc. However, Plan B will
only make you sick briefly (if it's going
to make you sick), pregnancy will make you
sick for weeks and weeks. At least that
is what happened in my case., when I was
pregnant.
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Ingi
Supporter
Joined: 09 Mar 2006 Posts: 8884 Location: Grinning like a Cheshire Cat,
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Posted: 01-31-08 23:51pm
Futureshock, please explain how it
prevents an egg from attaching to the
uterin lining. BECAUSE I'M FASCINATED
TO KNOW!
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Verizon-y
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Joined: 29 Aug 2007 Posts: 3291
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Posted: 02-01-08 01:15am
How much more explicit could I possibly
be? I just posted the exact biology of
Plan B.
If biology doesn't work for you, how about
pro-life websites?
Given the above, there is no evidence that
shows that the endometrial changes
produced by COCs contribute to failure of
implantation of conceptions, nor is there
evidence that COCs cause an increased per
pregnancy ratio of ectopics.
There is no
evidence that Plan B affects
implantation.
# There is evidence that suggests that
Plan B only prevents conception by either
making cervical mucus hostile to sperm or
preventing ovulation.
"'The post-fertilization effect was purely
a speculation that became truth by
repetition,' says Joe DeCook, MD, a
retired OB/GYN and vice president of the
American Association of Pro-Life
Obstetricians and Gynecologists."
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Verizon-y
Extremely EHEALTHy
Joined: 29 Aug 2007 Posts: 3291
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Posted: 02-01-08 01:25am
Ingi
wrote:
Futureshock, please explain
how it prevents an egg from attaching to
the uterin lining. BECAUSE I'M
FASCINATED TO
KNOW!
It doesn't prevent a fertilized egg from
attaching to the uterine lining.
Plan B is progesterone.
Progesterone helps maintain the uterine
lining, (This is why women undergoing
fertility treatment are sometimes given
progesterone to help maintain the
pregnancy}.
Progesterone stops ovulation because it
suppresses LH production by the pituitary.
I can tell you where the mistaken notion
started, and that was from looking at
women on the pill. If there is no
ovulation, there is no cascade of events
leading to thickening of the uterine
lining so implantation can take place.
That's the "hostile environment".
However, you can only have an insufficient
uterine lining of there is no ovulation.
The notion of ovulation occurring while a
woman was on the pill, getting fertilized,
and not implanting was based on the notion
that women on the pill have an insuficient
uterine lining. What was not taken onto
consideration was the fact that if
ovulation occurred while on the pill, the
cascade of events leading to a thickening,
sufficient for pregnancy uterine lining
would also occur.
Otherwise, you'd never hear of a woman
giving birth after getting pregnant while
on the pill. If Plan B stopped fertilized
eggs from implanting, it would work a lot
longer than 5 days after sex, and it would
work a lot better.
