The highest risk of birth defects from rubella occurs in the first trimester.

Name: The highest risk of birth defects from rubella occurs in the first trimester.
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The highest risk of birth defects from rubella occurs in the first trimester, as the virus can cross the placenta and affect the developing organs and tissues of the fetus. However, rubella infection during later stages of pregnancy can also cause health problems for the baby.

The Highest Risk of Birth Defects from Rubella Occurs in the First