Prader-Willi syndrome, which occurs in about one in every 15,000 to 25,000 live births, is the most common genetic disorder that can lead to life-threatening obesity in children. Boys and girls are equally affected.1
Scientists do not know what increases the risk for Prader-Willi syndrome. The genetic error that leads to Prader-Willi syndrome occurs at random, usually around the time of conception or during early fetal development. The syndrome is usually not hereditary.2
Genetic testing can identify the chance that a second sibling will develop Prader-Willi syndrome, a possibility that is usually less than 1%.
All related topics
All related news