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Timing key to accuracy of home pregnancy test. (25% False-Negative Rate in Some Cases).
The timing of implantation varies so much in relation to the day a woman's period is expected that many pregnant women will get false-negative results on home pregnancy tests until a week or more after they have missed their periods, while many others will get positive results a week or more beforehand.
The most serious implication of this finding is that fully 25% of pregnant women will get false-negative results on home pregnancy tests if they follow the typical instructions to test for pregnancy as early as the first day of the missed period," according to Dr. Allen J. Wilcox of the National Institute of Environmental Health Sciences, Durham, N.C., and his associates.
Some home test kits say that a negative result at that point indicates "you probably are not pregnant," and one kit definitively states "you are not pregnant." Such unfounded reassurance could lead a significant portion of pregnant women to fail to protect their ...
- Dollar store pregnancy tests are worth the buck.(ACROSS SPECIALTIES)
- Magazine article from: Skin & Allergy News Bates, Betsy September 1, 2009 700+ words
...with 27 QuickVue pregnancy tests (Quidel Corp...standard sensitivity for pregnancy tests used in physicians...at the day after a missed period or 2 weeks post ovulation...found that dollar pregnancy tests were 100% accurate...
- Dollar store pregnancy tests are worth the buck.(WOMEN'S HEALTH)
- Magazine article from: Internal Medicine News Bates, Betsy August 1, 2009 700+ words
...with 27 QuickVue pregnancy tests (Quidel Corp...standard sensitivity for pregnancy tests used in physicians...at the day after a missed period or 2 weeks post ovulation...found that dollar pregnancy tests were 100% accurate...
- Dollar store pregnancy tests worth the buck.(NEWS)
- Magazine article from: OB GYN News Bates, Betsy August 1, 2009 700+ words
...with 27 QuickVue pregnancy tests (Quidel Corp...standard sensitivity for pregnancy tests used in physicians...at the day after a missed period or 2 weeks post ovulation...found that dollar pregnancy tests were 100% accurate...
- New Study Shows First Response(R) is the Most Sensitive Over-the-Counter...
- Press release article from: PR Newswire February 2, 2004 700+ words
...day of her missed period. This study...Accuracy of home pregnancy tests at the time...With so many pregnancy tests on the market...before their missed period(1...day of the missed period. At-home pregnancy tests detect a...
- ... If there's a baby to bring up. (accuracy of home pregnancy tests)
- Magazine article from: Science News June 21, 1986 700+ words
...baby to bring up Home pregnancy tests are touted as a way...nine days after a missed period. But are the tests...three brands of home pregnancy tests had an average accuracy...10th day after the missed period, the average accuracy...
- New alert over home pregnancy tests as half are judged unreliable.
- Newspaper article from: The Evening Standard (London, England) February 18, 2004 700+ words
...OAKESHOTT WOMEN who use home pregnancy tests were today warned the kits...from the first day of a missed period do not pick up pregnancies...from the first day of the missed period, with some purporting to...hCG on the first day of a missed period. Professor Laurence ...
- Home pregnancy tests: how accurate?
- Newspaper article from: The Boston Globe July 28, 1994 700+ words
Dear Beth: How accurate are home pregnancy tests? How do they work, and how long do they take to give...earliest these tests can be used is the first day of your missed period. Because teens aren't always sure when that is, they...
- Negative pregnancy tests in urban adolescents: an important and often missed...
- Magazine article from: Pediatric Nursing Daley, Alison Moriarty Sadler, Lois S. Leventhal, John M. Cromwell, Polly F. Reynolds, Heather D. March 1, 2005 700+ words
...determine the incidence of negative pregnancy tests performed in an urban community for...period. Five hundred and fifty urine pregnancy tests were performed; 77% were negative...accessing health care services for pregnancy tests, the vast majority of which are negative...
