HPT Question
 

Is it possible to be 3 months pregnant and have a HPT come back as a negative?

If you test 3 months after your last encounter and it comes back negative would
that be 100% accurate?

Basically I'm asking at what point would an HPT be 100% accurate?

Thanks for any help on this.

HPT Question
 

"TChameleon" wrote in message
...
Is it possible to be 3 months pregnant and have a HPT come back as a
negative?

If you test 3 months after your last encounter and it comes back negative
would
that be 100% accurate?

Basically I'm asking at what point would an HPT be 100% accurate?

Thanks for any help on this.

I do know people who have moved when they've been pregnant and their new Dr
insists on a pregnancy test and it comes back negative cos of hormone levels
changing - and I'm taking 5 months, and even 8 months definitely pregnant
women.

HPT Question
 

I think you still have hcg in your system, no matter how pg you are. If you
were 3 months pg, then an hpt should show positive. If your only possible
sexual experience which could lead to pregnancy was 3 months ago, and your
hpt was negative, then I would say that you aren't pregnant. If you feel
like you might be, or haven't had your period since then, you may want to
see a doctor and find out what is going on.
--

Jamie & Taylor
Earth Angel, 1/3/03

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"TChameleon" wrote in message
...
Is it possible to be 3 months pregnant and have a HPT come back as a
negative?

If you test 3 months after your last encounter and it comes back negative
would
that be 100% accurate?

Basically I'm asking at what point would an HPT be 100% accurate?

Thanks for any help on this.

HPT Question
 

I dont believe they are ever 100% accurate but if it is positive then it is
like 99.9% right;) I have a friend that does not show + on HPT until she is
in her secound trimester but by then she would already have seen the Dr. and
had a blood test..

Tori

--
Bonnie 3/20/02
Anna or Xavier due 10/17/04
"TChameleon" wrote in message
...
Is it possible to be 3 months pregnant and have a HPT come back as a
negative?

If you test 3 months after your last encounter and it comes back negative
would
that be 100% accurate?

Basically I'm asking at what point would an HPT be 100% accurate?

Thanks for any help on this.

HPT Question
 

TChameleon wrote:

Is it possible to be 3 months pregnant and have a HPT come back as a negative?

If you test 3 months after your last encounter and it comes back negative would
that be 100% accurate?

Basically I'm asking at what point would an HPT be 100% accurate?

Never. No test is 100 percent accurate. There
are women who don't get positive HPTs and deliver babies.
It's not common, but it can happen.

Best wishes,
Ericka

HPT Question
 

TChameleon wrote:

Is it possible to be 3 months pregnant and have a HPT come back as a negative?

If you test 3 months after your last encounter and it comes back negative would
that be 100% accurate?

Basically I'm asking at what point would an HPT be 100% accurate?

Thanks for any help on this.

They're never 100% accurate. After 16 weeks, the hCG level drops dramatically.
The lower limit of 'normal' is pretty low, close to nil. You may just be
experiencing the drop a few weeks early. Still, you're far enough along that
your doctor should be able to detect a heartbeat with a doppler... when is your
next appointment?

Marion

HPT Question
 

On Thu, 03 Jun 2004 20:27:49 +0000, TChameleon wrote:

Basically I'm asking at what point would an HPT be 100% accurate?

Well, about one month after conception, the typical hCG levels reach
over 10 times the sensitivity of any HPT, so I'd say it would be highly
exceptional. Then again, when it comes to such matters, you can never say
it is 100% accurate. But after 3 months 99.999% would surely do.

--
-- I
mommy to DS (July '02)
mommy to three tiny angels (28 Oct'03, 17 Feb'04 & 20 May'04)
guardian of DH (33)

HPT Question
 

On Thu, 03 Jun 2004 19:18:53 -0400, Ericka Kammerer wrote:

Never. No test is 100 percent accurate. There
are women who don't get positive HPTs and deliver babies.

You mean never ever get a positive HPT, or just not in the first couple of
weeks after AF is due?

--
-- I
mommy to DS (July '02)
mommy to three tiny angels (28 Oct'03, 17 Feb'04 & 20 May'04)
guardian of DH (33)

HPT Question
 

Ilse Witch wrote:

On Thu, 03 Jun 2004 19:18:53 -0400, Ericka Kammerer wrote:


Never. No test is 100 percent accurate. There
are women who don't get positive HPTs and deliver babies.


You mean never ever get a positive HPT, or just not in the first couple of
weeks after AF is due?

I mean that no test result is every 100 percent
guaranteed. If you look at any single test, regardless
of the point in pregnancy, a negative result does not
guarantee that you're not pregnant. When you start
aggregating negative results, you start getting a picture
that is increasingly reliable, but no single test is
a guarantee, especially no single negative result.

Best wishes,
Ericka

HPT Question
 

Ilse Witch wrote:

On Thu, 03 Jun 2004 20:27:49 +0000, TChameleon wrote:


Basically I'm asking at what point would an HPT be 100% accurate?


Well, about one month after conception, the typical hCG levels reach
over 10 times the sensitivity of any HPT, so I'd say it would be highly
exceptional. Then again, when it comes to such matters, you can never say
it is 100% accurate. But after 3 months 99.999% would surely do.

Truly, I don't think it's that good, especially
with a negative result. See, for instance, this recent
study:

Am J Obstet Gynecol. 2004 Jan;190(1):100-5.
Accuracy of home pregnancy tests at the time of missed menses.
Cole LA, Khanlian SA, Sutton JM, Davies S, Rayburn WF.

USA hCG Reference Service, Department of Obstetrics and Gynecology,
School of Medicine, University of New Mexico, Albuquerque, NM 87131,
USA.

OBJECTIVE: The purpose of this study was to investigate the validity of
home pregnancy tests (HPTs) around the time of the missed menses. STUDY
DESIGN: Levels of human chorionic gonadotropin (hCG) were determined in
urine around the time of the missed menses, and 5th and 95th centiles
were calculated. In a blind study evaluating 18 brands of HPTs, each was
tested six times with five concentrations of hCG, 0 to 100 mIU/mL.
Sensitivity was defined as the concentration at which six of six brands
gave positive results, at the suggested reading time or at an extended
time. RESULTS: It was estimated that a sensitivity of 12.5 mIU/mL was
needed to detect 95% of pregnancies at the time of missing menses. Only
1 of 18 HPTs had this sensitivity. If faintly discernible results
considered, 2 of 18 brands gave false-positive or invalid results. Clear
positive results were given by only 44% of the brands at 100 mIU/mL hCG.
If one accepted faintly discernible and extended reading times, all
brands responded at 100 mIU/mL. A test with 100 mIU/mL sensitivity would
detect approximately 16% of pregnancies at the time of missed menses.
CONCLUSION: The utility of HPTs is questioned. Clinicians need to be
aware of the limitations of current HPT brands.

Certainly, at 3 months, it would be typical to have
enough hCG to set off a positive HPT; however, by then, hCG
levels are dropping significantly. Combine that with a bit
of a dud of a HPT and you can get a negative and still be
pregnant. Most likely, if you're testing negative, you're
not pregnant, but there are women who take test after test
and don't show a positive, even late in pregnancy.

Best wishes,
Ericka