PREGNANCY-BIRTH Messages for June, 1999: Re: SENSITIVITY AND PG TESTS

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Re: SENSITIVITY AND PG TESTS

From: Tracy (anonymous@obgyn.net)
Fri, 25 Jun 1999 15:12:19 -0500 (CDT)

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In reply to: Liz: "SENSITIVITY AND PG TESTS"

At Wed, 23 Jun 1999, Liz wrote: >
>I am confused. I am usually never late but now am 3 days late. I have
>felt pregnant...Nausea and full feeling.
>
>I would like the sensitivity of pregnancy tests explained. IE. If my
>HCG is doubling everyday (If I am pregnant) and tests can detect as
>early as the day I am late, why would a test three days later possibly
>be negative too (as I have been told it could be...)???
>Also what is the range of sensitivity for pregnancy tests (over-the
>counter, what doctors use--urine and blood)????
>
>What tests have the best sensitivity?????
>
>None of the tests I have seen list their sensitivity--the company I have
>called says there sensitivity is a 50. How sensitive is this????Can
>anyone explain the math so I can understand what this means for me???

Re-test in a few days, you may have ovulated a few days later than usual, and this can cause a negative result. It takes about 14 days past ovulation to get a positive result. The 1 day late thing isnt true for everyone, not everyone has the perfect 28-day cycle.

If you still get a neg. result, go get a blood test.

My OTC brand of choice was always Clear Blue Easy, it never failed me!

-- Tracy L. Trull MA, NA, PCT International Coordinator, OBGYN.net http://www.obgyn.net/women/bios/trull.htm tracy.trull@obgyn.net

This information is provided for education purposes and is not a medical consultation.

Next message: GT: "What can cause small traces of blood in urine?"
Previous message: Lisa: "Smoking"
In reply to: Liz: "SENSITIVITY AND PG TESTS"

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