Generally, pregnancy can be detected with a pregnancy test around 35 days of pregnancy, but there are individual differences in the exact time.
Pregnancy test is to determine whether pregnancy by testing the HCG in urine, the HCG value in urine will rise when a woman is pregnant, most of them can determine whether they are pregnant by testing the HCG in urine after 2 weeks of coitus or when their menstruation is delayed for about 3~7 days.
For women with regular menstrual cycles, a pregnancy test can be done when menstruation is delayed for 3 to 7 days; if the test result is positive, you are pregnant, and if it is negative, you are not pregnant.
However, if the menstrual cycle is irregular and the fertilized egg is late in implanting, the time to detect pregnancy may be delayed, and it is likely that pregnancy can only be detected after the menstrual period has been delayed for more than a week.
Pregnancy tests have a certain degree of error, if your period is delayed and you suspect that you are pregnant, it is best to go to the hospital for a blood test to determine whether you are pregnant or not, the accuracy is higher.