1. Preliminary judgment of pregnancy 1.1 Observe the menstrual cycle 1.2 Pay attention to physical changes 2. Use drugs to detect pregnancy 2.1 Pregnancy test paper 2.2 Serum β-HCG test 3. Go to the hospital to check whether you are pregnant 3.1 Gynecological examination 3.2 B-ultrasound examination 4. Precautions and misunderstandings 4.1 Pay attention to the side effects and error rate of drugs 4.2 Do not blindly self-diagnose and initially judge whether you are pregnant. After experiencing sexual intercourse, female friends sometimes worry about whether they are pregnant, but do not want to go to the hospital or do not want to go to the hospital.