There are several precautions before the pregnancy test: 1. 3-5 days before the test, the diet should be light, and animal foods such as pig liver and pig blood are prohibited. 2. the morning of the test day should be fasting, water is prohibited, and no food can be eaten. 3. the ultrasound test should be held in advance, and the ultrasound test needs to be performed under the condition of a full bladder. 4. the test for women should Avoid menstruation and get enough sleep the day before the checkup so as to keep energetic on the day of the checkup. The general checkups for pregnancy preparation include routine blood, urine and leukorrhea, as well as electrocardiogram, liver and kidney function, ultrasound of the uterus and adnexa, hepatitis B and half, and examination of infectious diseases such as hepatitis C, AIDS and syphilis, etc. Generally, both men and women need to check the viability of sperm and eggs before pregnancy, and the male partner also needs to check the semen routine.