The common methods to check whether you are pregnant at an early stage include early pregnancy test strips, blood hcg level assay, ultrasound examination, basal body temperature monitoring, etc.: 1. Early pregnancy test strips assay: it is usually performed about 5 days after the delay of menstruation. The test result of two red bars is positive, which indicates a high possibility of pregnancy; 2. Blood hcg test: it can be performed on the 7th-10th day after having intercourse during ovulation, and when the blood hcg concentration is higher than the normal value, early pregnancy can be confirmed; 3. After 5 days of menstrual delay, ultrasound examination can be done, and if a gestational sac is seen in the uterine cavity, coupled with a positive result of early pregnancy test, pregnancy can be Pregnancy can be confirmed; 4. You can also determine whether you are pregnant by monitoring your basal body temperature yourself. If the basal body temperature is monitored daily with a thermometer after intercourse during ovulation, and the high temperature continues to appear for more than 2 weeks, especially if the basal body temperature continues to rise in the case of delayed menstruation, the possibility of pregnancy is very high.