At 24 weeks the fetus is usually usually around 500-780 grams, the weight of the fetus may fluctuate up and down depending on the nutritional status of the pregnant woman. At 24 weeks when the fetus has a biparietal neck of 5.3-6.5cm, a head circumference of 19.9-23.4cm, an abdominal circumference of 17.1-21.2cm, and a femur length of 3.7-4.5cm, the fetus has a body length of about 30cm, a parietal bone length of 21cm, and a weight of about 630 grams. If the nutritional intake of the pregnant woman is balanced during pregnancy, the weight of the fetus may be higher than 630 grams. In the 24th week of pregnancy, all organs of the fetus have developed, subcutaneous fat begins to be deposited, the skin is wrinkled due to the small amount of subcutaneous fat, eyebrows and eyelashes appear, fine bronchial tubes and alveoli have developed, and more obvious fetal movements can be felt. If the fetal weight is found to be less than 630 grams, you should eat more nutritious food, maintain a balanced nutritional intake, and regulate for a period of time can make the fetal weight increase, and you should do regular pregnancy checkups, except for pathological causes of fetal growth restriction.