Women stand at least a 20% chance of bearing children with birth defects such as deafness, intellectual disabilities, heart disease, or eye problems, including blindness, if they are infected during the first 20 weeks of pregnancy with _____ .

A) rubella
B) syphilis
C) cystic fibrosis
D) phenylketonuria

Rubella

A viral infection that can cause intellectual disabilities and heart disease in the embryo. Also called German measles.

Birth Defects

Abnormalities present at birth that can cause physical or mental disability, ranging from mild to severe.

Intellectual Disabilities

Disabilities characterized by significant limitations both in intellectual functioning and in adaptive behavior, covering many everyday social and practical skills.