Due to different testing methods, the time to detect pregnancy after intercourse varies. For those who have regular menstrual cycle, pregnancy can be detected by blood HCG test 10 days after intercourse, and pregnancy can be detected by early pregnancy test paper about 2 weeks after intercourse. However, for women with irregular menstrual cycles, the detection time will be delayed, so the test can be conducted under the guidance of a doctor. After detecting pregnancy in early pregnancy, ultrasonography is also needed to clarify whether the pregnancy is intrauterine, usually in 35 days after menopause ultrasonography can detect whether there is a gestational sac in the uterus. Early pregnancy should also pay attention to appropriate rest, appropriate increase in nutrition, prohibit coitus, and follow the doctor’s instructions to continue to take folic acid to prevent the occurrence of fetal neural tube malformation.