Pregnancy is confirmed with a pregnancy test. A pregnancy test can be performed on either urine or blood. Levels of the HCG hormone 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 almost 100 percent accurate and can detect pregnancy approximately one week after conception.
Women can conduct an at-home pregnancy test by testing a sample of urine.
Home pregnancy tests have become more accurate in the last decade. Urine tests, in general, are usually 97 percent accurate if the result is positive, indicating that you are pregnant. However, if the test result is negative and no menstrual period resumes, a pregnancy test should be repeated one week later. Always consult your physician to confirm a positive at-home pregnancy test with a more reliable pregnancy test and physical examination. We regret that we can't answer medical questions via e-mail.