The medical formal term for great aunt is menstruation. Pregnancy can usually be detected if your period is delayed for 4 days.
Women of childbearing age who normally have a regular menstrual period that is delayed for 4 days are likely to be pregnant, and can test for pregnancy using a pregnancy test or a pregnancy test stick.
When a woman is pregnant, the HCG in her body will rise, and the HCG in her urine will rise as well, so she can determine pregnancy by using a test strip.
Generally, you can test whether you are pregnant after about 2 weeks of sexual intercourse or 3-7 days of delayed menstruation, and it is recommended to use morning urine test. Test strips are used to determine if you are pregnant by checking the HCG in your urine. If the test result is positive, it means that you are pregnant, and you can take a blood test for HCG to confirm the diagnosis; if the test is negative, it means that you are not pregnant, and you can continue to observe your menstrual cycle.