The document discusses ovulation prediction tests that detect luteinizing hormone (LH) levels. It answers questions about interpreting LH test results and the fertile window. Key points include: LH surges trigger ovulation within 24-48 hours; a positive test means ovulation will occur in that window; sex in the days leading up to and after a positive test can result in pregnancy. Proper use and interpretation of LH tests can help pinpoint the fertile days each month.

1. Lh Test Ovulation
Understanding Luteinizing hormone
http://lhhormone.org
Donna asks…
Could I be pregnant? I have been using LH Ovulation Tests to try
and pin point when im most fertile?
I have my period on the 20th of every month. I started doing LH Ovulation Tests (first thing in
the morning) on Monday (31st), they came back negative untill Wednesday (2nd) when it was
positive, reading; I would ovulate within the next 24 to 48 hrs. My partner and myself have been
having sex each day since monday (in the evening). I did another ovulation test on Thursday
(3rd) and Today (4th) but both have come back negative. Does this mean I am likely to be
pregnant or just that I missed the fertile window?
Pregnancy Advisor’s answers:
Ovulation is but a moment in time. It takes a fraction of a second for the egg to burst from its
follicle. Contrary to popular belief, you don’t ovulate for days. You are fertile for a few days
before ovulation because sperm can survive for 5 days – they hang around in your fallopian
tubes waiting for the egg to drop.
Ovulation tests detect the LH surge that triggers ovulation. We always have a low level of LH in
our body but just before ovulation the LH surges. The surge can be as short as 24 hours or as
long as 48 hours. Then, the LH level falls back to the normal, low level. You should only get a
day or two of a positive OPK. You had one. That means you should expect ovulation within 48
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2. hours of the positive. The OPK is supposed to go back to negative after a positive. It does not
mean you are pregnant or that you missed your fertile window. It just means your LH surge is
over. Now you are in the “two week wait” during which time there is nothing that is going to give
you any indication about a possible pregnancy. You just have to wait out the two weeks before
testing with a pregnancy test.
Lizzie asks…
What is an Ovulation Predictor Test- LH??
Pregnancy Advisor’s answers:
It detects leutenizing hormone(LH) which surges just before ovualtion. Most ovulation predictor
kits will detect ovulation 12 to 24 hours before it happens.
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3. Nancy asks…
Ovulation test… is this considered a LH surge?
I took one of those ovulation tests this morning when I woke up. The test line was almost as
dark as the reference line (awfully close in color)… but when I looked closer the edge of the test
line was faded a bit (looks like it was evaporated a bit). I am definitely going to take another one
tomorrow morning. But what I want to know is… do I consider this as my LH surge or should I
wait ‘til tomorrow’s result?
Pregnancy Advisor’s answers:
I would go ahead and try today and tomorrow and the next day.
My fertility doctor said unless your husband has a low sperm count, you can try every day, infact
it helps the sperm to swim faster. If that is an issue go today, and the day after.
Sperm can live for 3-5 days (unless your husband has a motility issue)
Do you have cervical mucous?
GOOD LUCK!
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4. Sandra asks…
Can sex effect a LH surge, therefor giving a false positive on
ovulation test?
Pregnancy Advisor’s answers:
Nope. The LH surge is initiated by a rise of estradiol produced by the follicle before ovulation.
Sex cannot alter this process. But you CAN have an LH surge and not ovulate (again, sex does
not affect this)…
Lisa asks…
Did this ovulation test detect the LH surge? (Picture)?
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5. It said it detects the LH surge if the first line is equally dark or darker than the second line, but
this test the first line was darker than the other tests I took over the last few days. I’m just
wondering if it detected that horomone?
http://i53.tinypic.com/9a2xjr.jpg
By passed do you mean passed as in I already ovulated, and it’s too late to get pregnant? Just
curious..
Pregnancy Advisor’s answers:
No, that is not a positive. By the way, you can’t compare tests with each other, only the
comparison with the control line counts.
Still it is so close to positive that either you can expect a positive tomorrow, or you have just
missed the surge. In other words: get busy, just in case! Even if you have missed the surge, that
does not necessarily mean you missed ovulation.
Linda asks…
I took a Ovulation test. And it showed the LH hormone on the 13th
of this month. I had intercourse on the 14th?
according to the first day of my period jan 31, I am suppose to ovulate on the 14th. The test i
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6. took detect the hormone on the 13th. But did not detect any on the days before. So, i guess are
my chances of getting pregnant good?
I had sex on the 14th around 10:00am on the 14th
Pregnancy Advisor’s answers:
Yes, you have an excellent chance. The surge means you can expect ovulation within 24 hours,
but keep in mind that the egg once released only lives for 12-20 hours max. So depending on
when you had sex on the 14th will depend on your chances of conceiving. Hopefully you timed
sex accurately. It’s a very short window once you ovulate. To increase your odds (if you don’t
fall pregnant this month) try having sex every other day starting 5 days before you ovulate.
Sperm can live inside you for several days waiting around for an egg.
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Answering Your Questions on LH Surge
http://LHSurge.org
Lh Test Ovulation
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