XYY syndrome can’t be cured. But treatments can help reduce its symptoms and effects, especially if it’s diagnosed early. People with XYY syndrome can work with healthcare providers to address ...

‌Although genetics are hereditary, a phenomenon in genetic alterations occurs when male babies receive an extra Y chromosome in each of their cells, resulting in an XYY combination. The syndrome ...

XYY babies are born within the normal ranges for height and weight, but between the ages of 12 to 14 they grow about four inches a year. The average height for a British man is 5ft 10in, while for ...