A femur length of 68mm at 37 weeks is not considered short, and should be assessed in conjunction with nutritional and genetic factors. Femur length refers to the length of the thigh bone of the fetus. During pregnancy, fetal femur length, biparietal diameter, abdominal circumference and other indicators are monitored to assess fetal growth. At 37 weeks of gestation, the normal femur length is between 65~74mm, so when the ultrasound suggests that the femur length is 68mm, it is normal and not considered to be on the short side, but also combined with the nutrition and parents’ height and other genetic factors to make a comprehensive assessment. At 37 weeks gestation, the pregnancy has reached full term, pregnant women should carry out fetal movement count to self-evaluate the intrauterine safety of the fetus, and also follow the doctor’s instructions for timely obstetric examination, and ultrasound examination to assess the growth and size of the fetus, as well as fetal heart rate monitoring to assess the condition of the fetus in the womb. When redness, abdominal pain or vaginal discharge occurs, it is important to go to the hospital promptly.