Pregnancy is confirmed with a pregnancy test. A pregnancy test can be performed on either urine or blood. Pregnancy tests detect the presence of human chorionic gonadotropin hormone (hCG), a hormone produced by the placenta about 10 days after fertilization. Levels of the hCG hormone approximately double every two days during the first 60 days of pregnancy.
Pregnancy tests that are performed using the woman's blood are done by a physician and are usually performed to obtain a very early diagnosis of pregnancy or also to confirm an at-home pregnancy test. Blood tests are very accurate and can detect pregnancy by the second week after conception.
Women can conduct an at-home pregnancy test by testing a sample of urine about two weeks after conception, or about the time a period is due. Home pregnancy tests have become more accurate in the last decade. If the test is used correctly, most home pregnancy tests are 97 to 99% accurate. It is recommended that users repeat the test in a few days, whether the result is positive or negative.
Always consult your physician to confirm a positive at-home pregnancy test with a more reliable pregnancy test and physical examination. If your at-home pregnancy test results are negative, and you think you are pregnant, you should also consult your physician.
Pregnancy Tests
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