The time to detect pregnancy in women after pregnancy depends on the test, which includes HCG value and ultrasound. HCG value test can be detected 7-10 days after pregnancy, while ultrasound can be detected around 40 days after pregnancy. HCG, human chorionic gonadotropin, is synthesized by the syncytial trophoblast of the placenta. The trophoblast layer of the fertilized egg gradually forms on the 6th day after the union of sperm and egg and starts to secrete a small amount of HCG, which can be detected in the blood 7-9 days after fertilization and reaches its peak in 8-10 weeks and can be detected in the urine, i.e. pregnancy can be considered when two red bars appear on the early pregnancy test. However, to confirm the diagnosis, an ultrasound examination is needed to clarify the embryonic sac, to exclude ectopic pregnancy and to exclude other diseases that cause HCG elevation. In daily life, it is recommended that women with normal sex life who have delayed periods and are considering pregnancy should go to a regular pharmacy to buy early pregnancy test strips and, if necessary, go to a hospital obstetrics department to confirm the diagnosis.