NT refers to NT examination, which is the ultrasound measurement of the thickest subcutaneous echogenic hyaline layer of the fetus at the nuchal collar. The standard posture of the fetus in NT examination is orthogonal sagittal position, if the fetal posture is incorrect it will affect the examination result, the fetal position change can be promoted by the following ways to cooperate with the examination: 1. diet: you can drink drinks suitable for pregnant women such as juice and milk, you can also consume fruits or eat in moderation, the fetus will be relatively active after eating and easy to achieve a more standard posture; 2. exercise: pregnant women can promote fetal activity by When the fetus feels the change of environment, it will change its position appropriately; 3.Change of position: pregnant women can promote fetal activity by turning over left and right under the guidance of doctors; 4.Change of examination method: NT examination usually adopts transabdominal ultrasound, if the fetus continues to be uncooperative and the urgency of NT examination is high, transvaginal ultrasound can also be used. If the fetus still cannot cooperate with the examination after the above interventions, the pregnant woman can rest at home for 1-2 days and then perform the examination.