Pregnancy tests are designed to detect the presence of human chorionic gonadotropin (hCG) in urine or blood. hCG is a hormone produced by the placenta during pregnancy and is detectable in the urine as early as 10-12 days after ovulation.
Pregnancy tests are a convenient and accurate way to confirm pregnancy. They are available over-the-counter at most pharmacies and can be performed at home. Home pregnancy tests are typically 99% accurate when used correctly.