Which factor contributes the most to an increased risk for chromosomal anomalies?
a. Maternal or paternal age
b. Maternal or paternal occupation
c. Environmental exposure to teratogens
d. Seeking prenatal care late
A
Maternal or paternal age is one of the most common causes of chromosomal anomalies. Maternal or paternal occupation is not associated with chromosomal anomalies. While environmental exposure to teratogens is associated with congenital anomalies including fetal demise, this is not a common factor associated with chromosomal anomalies. Lack of prenatal care can jeopardize both the fetus and the mother, but it is not associated with chromosomal anomalies.
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