Home » At what maternal age the probability of having a child with Down’s syndrome is increased drastically? Chromosomal Aberrations MCQs At what maternal age the probability of having a child with Down’s syndrome is increased drastically? February 8, 2022 2 Views Q. At what maternal age the probability of having a child with Down’s syndrome is increased drastically? A. 25 B. 30 C. 35 D. 45 Answer: 35