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Ethical Dilemmas in Genetic Testing Prenatal Genetic Testing Geneticists are frequently asked to help couples use prenatal diagnosis or assisted reproductive technology to avoid having offspring with a serious hereditary…

Among the affected individuals, two were heterozygotes for FVL and one was homozygous for FVL. Set up a 3 × 2 table for the association of the homozygous FVL genotype,…

References for Specific Topics Amstutz U, Carleton BC. Pharmacogenetic testing: time for clinical guidelines. Pharmacol Therapeutics. 2011;89:924–927. Bennett MJ. Newborn screening for metabolic diseases: saving children’s lives and improving outcomes….

Unfortunately, no DNA analysis had been conducted on the woman’s brother to determine what type of mutation in the DMD gene he had. The woman was investigated by molecular analysis…

Specific References American College of Obstetricians and Gynecologists Committee on Genetics. The use of chromosomal microarray analysis in prenatal diagnosis. Obstet Gynecol. 2009;122:1374–1377. American College of Obstetricians and Gynecologists Committee…

General References Gardner RJM, Sutherland GR, Shaffer LG. Chromosome abnormalities and genetic counseling. ed 4. Oxford University Press: New York; 2011. Milunsky A, Milunsky J. Genetic disorders and the fetus:…

Genetic Counseling for Prenatal Diagnosis and Screening The majority of genetic counselors practice in the setting of a prenatal diagnosis program. The professional staff of a prenatal diagnosis program (physician,…

Figure 17-9 The different types of mosaicism that may be detected by prenatal diagnosis. A, Generalized mosaicism affecting both the fetus and placenta. B, Confined placental mosaicism with normal (red) and abnormal…

Although the parents of a child with chromosomal aneuploidy may have normal chromosomes themselves, in some situations there may still be an increased risk for a chromosomal abnormality in a…