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False negative on pregnancy test

A 27-year-old female asked:
Dr. Robert Kwok
33 years experience Pediatrics
Hmmm...: Most women know they are 16 weeks pregnant without a urine or blood test. So, if there is an obvious baby inside, then any negative pregnancy test is ... Read More

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A 18-year-old female asked:
Dr. Robert Killian
28 years experience General Practice
Testing too soon: Many people test for pregnancy way before the test could be valid. If one tests before a missed period the test is completely invalid if negative and ... Read More
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A 18-year-old female asked:
Dr. Robert Kwok
33 years experience Pediatrics
Yes, sometimes: A urine pregnancy test, done correctly, gives a reliable result 3 weeks after sex (3 weeks after when conception might have occurred), or 1 week after ... Read More
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A 17-year-old female asked:
Dr. Anne Phelan-adams
A Verified Doctor answered
A US doctor answered Learn more
It increases the: possibility of a false negative, but there's no certainty. HCG levels rise almost exponentially in the first trimester, so eventually it will turn p ... Read More
A 26-year-old female asked:
Dr. Hector Chapa
25 years experience Obstetrics and Gynecology
Depends: Almost all comercial preg tests report efficacy close to 99%. Trick is however, that depends on when they are done. There is a higher false negative r ... Read More
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A 46-year-old member asked:
Dr. Heidi Fowler
25 years experience Psychiatry
Yes: If you test too early that can occur.
A 24-year-old female asked:
Dr. Heidi Fowler
25 years experience Psychiatry
No: Oral contraceptives will not cause a false + or a false - on a pregnancy test.
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1 thank
A 23-year-old female asked:
Dr. Malcolm Macdonald
34 years experience Family Medicine
No.: Since the test measures the presence (for a positive test) of the hormone hCG, no foods or diet changes will affect the test result--either positive o ... Read More
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3 thanks
A 27-year-old female asked:
Dr. Robert Killian
28 years experience General Practice
False Pregnancy test: Yes, but only early on. More than one negative makes it harder and harder statistically to be false as long as you have waited the appropriate amount ... Read More
1
1 thank

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