Final answer:
A woman should wait at least 4 weeks after receiving the rubella vaccine before trying to become pregnant to minimize the risk of congenital rubella syndrome in the fetus.
Step-by-step explanation:
The recommended interval for a woman to wait before becoming pregnant after receiving the rubella vaccine is at least 4 weeks (1 month). This waiting period is advised to prevent possible harm to the fetus from the live attenuated virus present in the vaccine. Congenital rubella syndrome (CRS) is a serious condition that can occur if a pregnant woman contracts rubella during pregnancy. CRS can lead to a high incidence of stillbirth, spontaneous abortion, or congenital birth defects, particularly if the infection occurs before 11 weeks of pregnancy.