Source: Adapted from C

question 41

Multiple Choice

Source: Adapted from C. A. Huether et al., Maternal age specific risk rate estimates for Down syndrome among live births in whites and other races from Ohio and Metropolitan Atlanta, 1970-1989, Journal of Medical Genetics 35: 482-90 (1998) . Figure 8.20B Maternal age and incidence of Down syndrome
-Which conclusion can best be drawn from this study?

• A) Women of age 20 or younger never have a child with Down syndrome.
• B) Women in this study who were 45 years old had three times the incidence of babies with Down syndrome as did 40-year-old women.
• C) Many babies with Down syndrome die before birth.
• D) For 40-year-old women around the world, ten births per thousand have Down syndrome.

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