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Down Syndrome: Prenatal Risk Assessment and Diagnosis - American Family Physician

Aug 15, 2000 - Down syndrome (trisomy 21) is the most commonly recognized genetic cause of mental retardation. The risk of trisomy 21 is directly related to maternal age. All forms of prenatal testing for Down syndrome must be voluntary. A nondirective approach should be used when presenting patients ...

American Family Physician : Article

https://www.aafp.org/afp/2000/0815/p825.html

Screening for Genetic Risk of Breast Cancer - American Family Physician

Jan 1, 1999 - Approximately 10 to 15 percent of all breast cancers are thought to be familial and about one third of these cases are due to an inherited mutation in a BRCA1 or BRCA2 breast cancer-susceptibility gene. The lifetime incidence of breast cancer in mutation carriers is above 50 percent, ...

American Family Physician : Article

https://www.aafp.org/afp/1999/0101/p99.html

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