Final answer:
A woman should avoid getting pregnant for at least one month after receiving the rubella immunization to prevent the risk of congenital rubella syndrome.
Step-by-step explanation:
It is advised that a woman should avoid getting pregnant for at least one month after receiving the rubella immunization. Rubella, also known as German measles, is teratogenic and can cross the placenta during pregnancy, which can potentially cause developmental defects, stillbirth, or congenital birth defects, especially if the mother is infected in the early stages of pregnancy. Therefore, the recommended waiting period is to ensure that if a woman does become pregnant, the fetus is not at risk of contracting congenital rubella syndrome.