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A 30-year-old member asked:

do some pregnancy test don't work?

2 doctor answers4 doctors weighed in
Dr. Dennis Higginbotham
Obstetrics and Gynecology 30 years experience
Rare: The currently available pregnancy tests are accurate over 98% of the time. It is uncommon for one to be wrong.
Dr. Carlos Satulovsky
Psychiatry 28 years experience
The main reason: The most common cause for the wrong result is to use the wrong technique, or expecting the test to detect pregnancy beyond the period of time it was designed for.

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A 35-year-old member asked:

When a pregnancy test will work?

1 doctor answer2 doctors weighed in
Dr. Michael Sparacino
Family Medicine 37 years experience
1 week late: Home pregnancy tests will turn positive when you're about 1 week late. If it's negative, repeat it in 1 week.
A 36-year-old member asked:

Could you describe how does the pregnancy test work?

1 doctor answer1 doctor weighed in
Dr. Michael Sparacino
Family Medicine 37 years experience
Follow directions: Home pregnancy tests generally become positive when you're about 1 week late with respect to your period. If it's negative, repeat in 1 week.
A 38-year-old member asked:

How soon will pregnancy test work after symptoms develop?

1 doctor answer2 doctors weighed in
Dr. Michael Sparacino
Family Medicine 37 years experience
See below: Nome pregnancy tests become positive at about he time you'r start your next expected period. If it's negative, repeat in 1 week and see your doctor.
Cawker City, KS
A 29-year-old female asked:

Are the rexall pregnancy test any good, do they work?

1 doctor answer1 doctor weighed in
Dr. Gurmukh Singh
Pathology 49 years experience
Yes: If you miss your period by 4-5 days, do a home pregnancy test. If the result is negative repeat the test 4-5 days later unless you get a period by then. Use first morning urine and follow the instructions for the test carefully.
A member asked:

How fast for a over counter pregnancy test to work?

2 doctor answers3 doctors weighed in
Dr. Gurmukh Singh
Pathology 49 years experience
See below: A home test may be positive one day after a missed period and would indicate pregnancy. A negative test that soon will not exclude pregnancy. It would be better to 4-5 days after missed period, use first morning urine and follow the instructions in the package carefully.

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Last updated Sep 15, 2013
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