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Despite the claim that home pregnancy tests are effective as little as two to three days before the first day of your next menstrual cycle, the female body does not always live up to this expectation.

At your first prenatal visit, your doctor will do several blood test including a test check your blood type, whether it's type O, A, B, or AB, and your Rh status, whether it's Rh-negative or Rh-positive.

In these 12 steps we show you how to improve the accuracy of doing a pregnancy test

The best time to take a pregnancy test is determined by the type of test. The two primary tests check the hormone levels found in urine and blood. 

A home pregnancy test allows you to perform a test in your home to determine if you are pregnant.

Most pregnancy tests are not positive until after you miss your period.

Contrary to a pregnancy test a faint OPK line is not a positive line.

A pregnancy test, no matter if it's blood or urine, only becomes posiitive after implantation when the fetus has attached to the uterine wall and connects with the mother's blood system.

Positive pregnancy test results can show up any time before or after a missed period. Read below more about when the pregnancy test result first becomes positive.