It is not always possible to detect pregnancy two days after your period by using an early morning pregnancy test, but it can be detected by drawing blood. Generally, soon after the fertilized egg has been laid, the trophoblast cells can produce human chorionic villus-promoting hormone (HCVPH), which can be detected by radioimmunoassay as an elevated level of HCVPH in the blood. If the pregnancy is too short, human chorionicity-promoting hormone may not be detected in the urine. If the first test result is negative, you can take another test after a period of time, or go directly to a regular hospital for a blood test. Generally for healthy women of childbearing age who usually have regular periods and are sexually active, once they are past their menstrual cycle, they should consider the possibility of pregnancy and go to the hospital to have blood drawn to check the HCG results. Specifically to determine intrauterine pregnancy, ectopic pregnancy also have to do ultrasound examination.