When can i take a pregnancy test and get accurate results?

3-5 days: Most consumer pregnancy tests now rival medical office pregnancy tests in technology and accuracy. The earlier the test, however, the more likely the possibility of error, both false positive and negative. Some over-the-counter tests tout their ability to diagnosis pregnancy up to seven days before a missed period -- the best idea, however, is to test on the day your period is due. For accuracy.

28 days: Most over-the-counter pregnancy tests are extremely accurate at time of your missed cycle. Some are more sensitive and able to detect pregnancy about 5 days earlier. If you take an early pregnancy test and it is negative, test again a week later.