Children with xyy chromosomes are generally not allowed. xyy chromosomes are generally referred to as hyperandrogenic syndrome, which is a disorder of sex chromosome abnormalities. Hyperandrogenic syndrome is mostly caused by Y chromosome non-separation of the father’s sperm in the second meiotic cleavage, resulting in part of the sperm with extra Y chromosomes, or possibly part of the Y chromosome non-separation in the process of egg cleavage. Clinical symptoms of hyperandrogenic syndrome are tall stature, often exceeding 180 cm in height, and mild facial asymmetry. It has poor self-restraint, irritability and roughness, aggressive behavior, and some patients may also have somatic acuity, which can seriously affect normal life. If xyy chromosome situation, it is recommended that pregnant women go to regular hospitals, relevant examinations, clear causes, and actively cooperate with doctors to take relevant treatment measures.