A study of the effects of anti–herpes drugs on pregnant women has found that there is no increased risk of major birth defects for mothers who were exposed to the antiviral drugs during their first trimester. The study's authors state: "Our study, to our knowledge the largest of its kind, found no significant association between first–trimester exposure to antiherpetic antiviral drugs and major birth defects. Acyclovir is the most extensively documented antiviral and should therefore ... Click Here to Read More Click Here to Read More