I think that at home pregnancy tests have
some secret chemical in them that makes me
start my period. It never fails, if I am
one week early or one week late...whenever
I take a test I start my period the next
day.
Does anyone else see this trend?
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shortgeek
Active User, Really EHEALTHy
Joined: 02 Dec 2006 Posts: 597 Location: DC
Posted: 03-25-07 07:09am
In my profession, we call that a selection
bias.
Now I'm going to show my geek side...
If the population randomly took pregnancy
tests - men and women, on bcp and not, ttc
and not, any day of the month/cycle - then
you probably won't get that trend.
Most tests are probably taken by women who
are ttc. (women who are unexpectedly late
probably take fewer tests.) To avoid a
false negative, these women take the test
close to when af is due. Since the odds
of getting pregnant are 25% or less, that
means that 75% or more of the tests will
be negative right before af shows up.
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Volaremos
Experienced User , Rather EHEALTHy
Joined: 09 Aug 2006 Posts: 421
Posted: 03-26-07 03:38am
Sorry it happens for you.
Well i dont really like those HPTs because
if you have one your mind will force you
to test, & mostly girls will end up
heart broken, so i never keep them at home
.
I only tested once with a HPT ( in my 12
cycles ) & that one test gave a BFP.
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