Chromosomal abnormalities can lead to abnormal physical development, abnormal intellectual development of the child, and pregnant women are not able to give birth to a healthy fetus. Chromosomal abnormalities generally refer to abnormal chromosome number and abnormal chromosome structure, and chromosomal abnormalities have a relatively large impact on a child’s growth and development. Chromosomal abnormalities will affect the development of the child’s body, Down syndrome is a typical chromosomal abnormality disease, manifesting asymmetry of the features, low nose, wide eye spacing, cranial deformity, mental retardation, congenital heart disease and other phenomena. Chromosomal abnormalities may also lead to cryptorchidism, lack of beard, and non-hairline in boys, and lead to lack of first menstruation, breast failure, and hermaphroditism in women. Chromosomal abnormalities may affect the intellectual development of the child, and the intelligence may differ from that of children of the same age, showing symptoms such as slow response, mental retardation and dementia. After pregnancy, you should do a good job of maternity testing, chromosomal abnormalities should be timely prenatal diagnosis to clarify whether the pregnancy can continue.