nt value of 3.7 need to follow the doctor’s advice for amniocentesis, to rule out chromosomal diseases and structural abnormalities of the child can be, when clear chromosomal diseases or structural abnormalities can not be. NT refers to the thickness of fetal nuchal translucency, which is measured by ultrasound to rule out the risk of chromosomal diseases in the fetus, and the normal value is <2.5mm, when the NT value is 3.7mm, it is necessary to follow the doctor's advice to carry out prenatal diagnostics, such as amniocentesis, to further clarify the condition of the fetus. When chromosomal diseases and structural abnormalities are ruled out, the pregnancy can continue, but when it is clear that there are chromosomal diseases and structural abnormalities, it is recommended that professional genetic counseling be conducted and the pregnancy be terminated in a timely manner if necessary. Prenatal checkups must be conducted in a reasonable and standardized manner under the guidance of a doctor during pregnancy, so as to be able to detect pregnancy complications and intervene in a timely manner for treatment, and to be able to detect fetal abnormalities as early as possible and give them treatment at an early stage, so as to improve the quality of pregnancy and reduce the risk of pregnancy, in order to ensure the safety of mothers and infants during pregnancy.