At 28 weeks, the fetus is already in the perinatal period. During this period, the fetal biparietal diameter is usually around 7.46cm, the head circumference is around 26.2cm, the abdominal circumference is around 24cm, and the fetal weight is around 1kg, but there are individual differences, as long as the development is normal. If the fetus is significantly large or small and the pregnant woman had irregular menstrual cycle before, she needs to re-check the week of pregnancy. At 28 weeks, if the fetus is found to be large, it is important to pay attention to whether the pregnant woman is over-nourished or has gestational diabetes, and a 75g glucose tolerance test is recommended. If gestational diabetes is found, it is recommended to control the weight through diet and exercise to avoid the fetus being too large and causing difficult cephalic delivery during labor. At 28 weeks, if the fetus is found to be small, it is important to pay attention to whether the pregnant woman has nutritional deficiency. It is recommended to enhance nutrition and eat more protein-rich food. If there are symptoms of calcium deficiency, they should take calcium supplements in time. If there is anemia, iron supplements should be taken. After the nutritional diet adjustment, the pregnant woman can review the ultrasound after half a month. 28 weeks, the fetus’ organs have basically developed, and the eyes have certain response to light, so the fetal movement will be more obvious. Therefore, it is recommended that pregnant women should closely count the fetal movement after 28 weeks, and if they feel that the fetal movement is particularly frequent or significantly reduced, they should seek medical consultation at any time.