The main precautions for pre-pregnancy checkups are water fasting, light diet, holding urine, and not wearing clothes with metal buttons. 1. Water fasting: the day before the test, we should pay attention to the water and food fasting after 0:00, if the body’s ability to digest and absorb is relatively weak, you can consider the night before after 8-9:00 pm fasting, water fasting. 2. Light diet: five days before the pre-pregnancy test, you need to eat a light diet, try not to eat pig liver, pig blood and other bloody food. And avoid drinking alcohol, coffee, strong tea and other stimulating beverages the day before the test. 3. Holding urine: pre-pregnancy checkups have gynecological ultrasound, this checkup is more accurate in the state of full bladder judgment, ultrasound should do a good job of holding urine before checkups, if you have morning urine in the morning, you can collect it. 4. Don’t wear clothes with metal buttons: when doing X-ray examination, wear cotton clothes, don’t wear clothes with metal buttons, if there are necklaces, pens, keys and other metal items on the body, it is best not to bring them, and if you bring them, you have to remove them in time. Pre-conception and pregnancy health care is an important measure to reduce the incidence of complications and mortality of pregnant women and perinatal babies, and to reduce birth defects. To ensure the superiority of your baby, preconception checkups are essential.