Defective or missing portions of paternal genes responsible for Prader-Willi syndrome usually occur randomly. This means that in most instances, Prader-Willi syndrome can't be prevented. However, in a small number of cases, a genetic mutation inherited from the father may cause Prader-Willi syndrome.
If you have a child with Prader-Willi syndrome and would like to have another baby, consider seeking genetic counseling. A genetic counselor may help determine your risk of having another child with Prader-Willi syndrome.
May. 01, 2013
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- Cassidy SB, et al. Prader-Willi Syndrome. In: Pagon RA, et al., eds. GeneReviews. Seattle, Wash.: University of Washington; 1993. http://www.ncbi.nlm.nih.gov/books/NBK1330/. Accessed Feb. 23, 2011.