WOMENS-HEALTH Messages for September, 2007: Re: PREGNANCY: pregnant with negative blood tests

Re: PREGNANCY: pregnant with negative blood tests

From: D. Ashley Hill (anonymous@obgyn.net)
Sat, 29 Sep 2007 16:47:02 -0500 (CDT)

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In reply to: amanda: "PREGNANCY: pregnant with negative blood tests"

Although (rarely) some women may have a positive serum pregnancy test when they are not pregnant (due to a crossreaction with the antibodies used in the serum testing), this does not sound like your situation. With a bunch of negative urine tests and 2 negative home tests, you either are barely pregnant (say 2 weeks after conceptions), or, most likely, not pregnant.

HCG levels tend to rise until about 9 weeks, then they level off and can drop after that. To my knowledge there is no such thing as HCG levels being "too high" to register on a serum test. For example, some women with tumors or abnormal placentas can have HCG levels above 500,000 and those show up on qualitative or quantitative HCG tests. Best wishe,

Ashley Hill

t Sat, 29 Sep 2007, amanda wrote: >
>I have been on birth control for 4 months and have had a withdrawal
>bleed every month. The last time I had intercourse was July 15. I have
>since had the scheduled withdrawal bleed every month, but have still
>felt wierd, so I've taken about 20 HPT's and they've all come back
>negative, with the exception of one that I left sitting out and looked
>at it 3 hours later and it had some pink where a positive would have
>been but not a full line. So, that scared me enough to go get a
>qualitative blood test the next day, which turned out to be negative.
>Still being over paranoid, I went a week later and had another qual.
>blood test done, which also came out negative. I would be anywhere from
>10-12 weeks along if I am pregnant. My question is, Would being that
>far along make my HCG levels too high to register on the qualitative
>blood test or would the results be accurate?

-- D. Ashley Hill, MD Division Director, Dept. of Obstetrics and Gynecology Florida Hospital Orlando Medical Director Loch Haven Ob/Gyn Group 235 East Princeton Street, #200 Orlando, Florida 32804 http://www.lochhavenobgyn.com

Please understand that due to time constraints I am unable to answer any personal emails, therefore they will receive no response.

These comments are general educational comments and should not be construed as specific medical advice. The best person to answer your health care questions is your physician or other health care provider. Thank you very much.

Next message: BabyGirl: "GENERAL: Ovary"
Previous message: Sue: "GYNECOLOGIC: Blood during Orgasm"
In reply to: amanda: "PREGNANCY: pregnant with negative blood tests"

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