Pasternak B, Hviid A. Use of acyclovir, valacyclovir, and famciclovir in the first trimester of pregnancy and the risk of birth defects. JAMA 2010;304(8):859-866
No association was found between the use of aciclovir (Zovirax), or valaciclovir (Valtrex), in early pregnancy and major birth defects.
Makrides M, et al. Effect of DHA supplementation during pregnancy on maternal depression and neurodevelopment of young children: a randomized controlled trial. JAMA. 2010; 304(15): 1675-1683
DHA supplements in the later half of pregnancy are not associated with improvements in maternal depression or infant neurodevelopment.