Congenital dysgenesis, also known as trisomy 21, or Down’s syndrome, is an abnormality of the 21 chromosomes, resulting in a significant abnormality of the patient’s intelligence. Most children have congenital anomalies, such as heart malformations, which can be corrected by early, timely open-heart surgery if there are significant abnormalities affecting the child’s growth and development. The child may have a low immune system, so it is important to eat more foods containing vitamin C, such as oranges, kiwis, tomatoes and so on, and to pay attention to physical exercise to strengthen the child’s resistance. In fact, for trisomy 21, we can perform Down’s syndrome screening in about four months of pregnancy, and if there are problems, non-invasive DNA testing. Therefore, the most reasonable way to conceive a healthy baby is to have a timely pregnancy test, which can reduce the occurrence of congenital stupidity, because such a child is indeed a great burden to the family and to society.