If you are pregnant or think you might be pregnant, tell your dentist during your visit.
During the first trimester, it is best to avoid any elective dental treatment. After that point, you can discuss your anesthesia options with your obstetrician or midwife, as well as with your dentist, to come up with the safest choice for you.
If possible, pregnant women should avoid local anesthetics that contain epinephrine. If this type of anesthetic is accidentally introduced into a blood vessel, it could lead to a decrease in blood supply to the placenta. It also could cause spasms in blood vessels, including the arteries that supply the uterus.