First Response Double Tests Early result pregnancy tests have ultra sensitive technology that can detect very small amounts of the pregnancy hormone human chorionic gonadotropin (h CG). This means women can get an answer one day before any other pregnancy test on the market. The First Response Early Pregnancy Test is so sensitive that most women have enough h CG to be detected as early as 5 days before the day their period is due. First Response is an analogue test Two pink lines will appear in the result window to indicate pregnancy. One line might be lighter than the other but this still means a positive result. If the second pink line is faint it is worth re-testing to see if it gets stronger, as the amount of pregnancy hormone increases as pregnancy progresses. Directions for use Hold the test in your urine stream for a couple of seconds. Read the result in 3 minutes. Two pink lines means pregnant, one pink line means not pregnant.