How long does it take to detect pregnancy? After having sex, if women want to confirm whether they are pregnant, early pregnancy testing can give them the necessary answers. So, generally speaking, how long does it take to take a pregnancy test? What details should we pay attention to? The following introduces pregnancy testing in early pregnancy from four aspects: time, method, accuracy and details that need attention. Time: How long does it take to detect pregnancy? HCG is usually measured from 12 days before the expected menstrual day to 2 days after the menstrual day (