How long does it take to detect pregnancy? Pregnancy is a concern that every woman is concerned about. If you want to know whether you are pregnant, you can usually get the answer by taking some pregnancy tests. However, women are often confused about how long it will take to detect pregnancy, as well as the methods and precautions for pregnancy testing. Below we will answer these questions in detail. 1. How long does it take to detect pregnancy? Generally speaking, progesterone can be detected in early urine 7-10 days after conception. However, different women’s physiques and different conception times may lead to different pregnancy test results.