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(reply to Anonymous)

Good question...it sounds like you are wanting to know the difference between when does LH actually spike in your body vs. when does the test actually detect the LH spike?

I wish there was a definitive answer for you, but there is not. The LH "surge" can occur in your body, and it is predicted for most women, most of the time, to occur between days 10-14. Your question: when is it DETECTABLE is dependent upon many factors, including what type of test you are using, and what it specifically claims as its LH "threshold" for detecting LH. There is no real standard amount of LH to constitute a "surge", and your test will only be able to detect LH above a certain threshold amount.

Does that make sense?

To answer your question more directly, "how long is LH still detectable after I ovulate?", the answer is: "depends on the test, what it's threshold amount for detecting LH is, how much of a "surge" you have in any given cycle, how frequently you are testing, etc.".

If your test says that it can detect LH in levels of 25-30 mIU, then most of them say they detect LH as it spikes before ovulation, and the spike may/may not last for 1-2 days. If you ovulate on day 14, the test may/may not still detect LH on day 15.

May 2, 2010 - 1:43pm

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