The most important risk factor for Down syndrome is:
A) increased maternal age.
B) a family history of Down syndrome.
C) fetal exposure to teratogens during pregnancy.
D) previous multiple pregnancies.
Answer: A
The most important risk factor for Down syndrome is:
A) increased maternal age.
B) a family history of Down syndrome.
C) fetal exposure to teratogens during pregnancy.
D) previous multiple pregnancies.
Answer: A