The Verdict: The test, called Clearblue Advanced Pregnancy Test with Weeks Estimator, is 93% accurate in estimating how long since ovulation, the day the egg was fertilized, according to a study funded by SPD Swiss Precision Diagnostics GmbH, of Geneva, a joint venture of Procter & Gamble Co. and Alere Inc.

Are Clear Blue pregnancy tests ever wrong?

(For example, the Clearblue Early Detection Pregnancy Test claims more than 99 percent accuracy if you test the day of your expected period or one, two or three days before; 96 percent accuracy four days before; and 79 percent five days before.

Are clear blue dating tests accurate?

How accurate is the Clearblue Weeks Indicator? The Weeks Indicator is 93% accurate in telling when you conceived when compared to time since ovulation. A published study comparing dating by Weeks Indicator with ultrasound (11-13 weeks) standard of care found that results agreed 97% of the time*.

Can a clear blue Negative be wrong?

The hook effect incorrectly gives you a negative result on a pregnancy test. This can happen during early pregnancy or in rare cases — even into the third trimester, when its pretty clear youre preggers. During pregnancy your body makes a hormone called human chorionic gonadotrophin (hCG).

Can clearblue show false positive?

Most home pregnancy tests are reliable, for example Clearblues tests have an accuracy of over 99% from the day you expect your period, and while its possible a test showing a negative result is wrong, particularly if youre testing early, getting a false positive is extremely rare.

How early can clearblue detect?

The Clearblue Early Detection Pregnancy Test can be used to detect pregnancy as early as 6 days before your missed period. [1] Provides early detection of the pregnancy hormone. 71% of pregnancies can be detected 6 days before the missed period (5 days before the expected period).

Has anyone ever got a false positive pregnancy test?

Its possible to have a positive pregnancy test even if you arent technically pregnant. This is called a false positive. Its sometimes caused by a chemical pregnancy. A chemical pregnancy occurs if a fertilized egg, known as the embryo, is unable to implant, or grow, very early on.

Is it an evaporation line or faint positive?

Share on Pinterest An evaporation line does not indicate a positive result. An evaporation line is a slight streak that appears where the positive line on a pregnancy test should be. Evaporation lines are colorless streaks, not faint lines.

Can you miscarry before positive pregnancy test?

Chemical pregnancies may account for 50 to 75 percent of all miscarriages. Chemical pregnancies take place before ultrasounds can detect a fetus, but not too early for a pregnancy test to detect levels of hCG, or human chorionic gonadotropin.