Question 1

why are hpts only 99% accurate?

Accepted Answer

We are humans!: We are humans so our world is not perfect, not 100%.  That means it is normal for lab tests not to be 100% accurate.

Question 2

why is my hpt negative?

Accepted Answer

That's normal: All normal girls and normal women have negative home pregnancy test results during the majority of their lifetimes. It's only when a woman becomes pregnant that the test result turns positive (but returns to negative after a baby is born). Thus, the normal baseline result is negative.

Question 3

when is an hpt 100% correct?

Accepted Answer

No test is 100% : By hpt, i assume you mean home pregnancy test. Statistically speaking, there is no test that is 100% correct 100% of the time. We're just happy to get 90+% sensitivity (positive test when you have condition) & specificity (negative result when you don't) when used properly as directed. But you can get false positive if guy takes hpt but you'd know to ignore result. Be sure to use test at right tim.

Question 4

when is an hpt 100% accurate?

Accepted Answer

Can be after 6-12 d,: This can vary but the hpt tests can be accurate at 6-12 days after fertilization which is around the time when implantation occurs.  There is the possibility of false negatives if done earlier.  The rosette inhibition assay for early pregnancy factor (epf) can be done 48 hours after fertilization, but is costly and llong. U/s also done.  See your doctor for more.

Question 5

how accurate are hpts at 21 weeks

Accepted Answer

They are excellent: The hpts are quite accurate, but they have their limit--maybe too early for the test to pick-up in  cases when testing too early. In your case, you said you are wt 21 wks, no hpt is needed because you should be showing. The uterus should be quite large now and should be up to your belly-button level. Plesse consult doc for care..Don't delay.
Good luck.

Question 6

can i take an hpt again same day?

Accepted Answer

Probably: If hpt means home pregnancy test, of course you can do multiple tests per day. But it would be more cost effective to wait a few days or more between tests.

Question 7

what does a white line on a hpt mean?

Accepted Answer

Check the: instructions that came with that home pregnancy test. Most of the time - HPT's change color to show a positive result.

Question 8

what is the latest you can take a hpt?

Accepted Answer

You mean earliest?: You may take hpt as many days after a missed period. 
Conception, as defined by the generation of a fertilized ovum, occurs within day or so of the sex. However, it takes about two weeks for the embryo to make enough HCG to produce a positive pregnancy test. Blood test may be done a day after a missed period. Home pregnancy tests should be done 4-5 days after the missed period. If the result is negative re do the test in 4-5 days, unless you get a period before then. Use first morning urine and follow instructions for the test carefully. If you do not wish to be pregnant, use contraception all the time, every time. You may consider implanted contraceptive, or IUD. 
Practice safe sex.

Question 9

what can cause negative hpt at 6 weeks?

Accepted Answer

Lack of fetus: If hpt is negative 6 weeks after the last menstrual period, you are not pregnant. It may have been an anovulatory cycle.

Question 10

1 day late neg hpt am i testing to early?

Accepted Answer

Pregnancy testing.: Yes, you could be testing too early.  Consider repeating it a week.

Get Virtual Care

For Businesses

About Us

HealthTap Online Primary Care Doctors Accepting New Patients

Doctor answers about:

Should i trust hpt

A member asked:

Why are hpts only 99% accurate?

A member asked:

Why is my hpt negative?

A member asked:

When is an hpt 100% correct?

A member asked:

When is an hpt 100% accurate?

A member asked:

How accurate are hpts at 21 weeks

A member asked:

Can i take an hpt again same day?

A member asked:

What does a white line on a hpt mean?

A member asked:

What is the latest you can take a hpt?

A member asked:

What can cause negative hpt at 6 weeks?

A member asked:

1 day late neg hpt am i testing to early?

HealthTap Online Primary Care Doctors Accepting New Patients

Telemedicine

Primary Care

Manage Your Conditions

Women's Health

Children's Health

Men's Health

Senior Health

Wellness, Prevention & Lifestyle

Sexual Health

Mental & Behavioral Health

Travel Medicine

Urgent Care

Didn't find what you're looking for?

More of what we treat

Allergies

Antibiotics

Asthma

High Blood Pressure

Prescriptions

Type 2 Diabetes

For Businesses

Company

Health Content

Join Us

Download HealthTap

Questions?