Pregnancy blood tests are over 99% accurate at detecting hCG, a hormone that rises after conception. False negatives can occur if the test is taken too early, so timing is important. Blood tests can ...

Many home pregnancy tests claim to be 99% accurate when testing is done on the day of an expected period. However, these estimates are based on laboratory testing of urine samples done by trained ...

Taking a pregnancy test too early can procure a false negative result. How do you know when it's time to take one?

A blood test combined with ultrasound data and other factors may help predict preeclampsia during the first trimester. The false-positive rate of 16% was an improvement over a different predictive ...

A pregnancy test from the store costs about $3 on average. A blood test that you get from a lab or doctor's office costs an average of $64. You might be able to get a free pregnancy test at a women's ...