 With the pending threat of pandemic avian influenza, the disproportionate morbidity and mortality documented in previous 20th century pandemics among pregnant women, and the lack of any data for use of these vital antiviral drugs in pregnancy, study of the pharmacology of oseltamivir in pregnancy is imperative. If and when the next pandemic occurs, a better understanding of this drugs safety and pharmacologic profiles for use in pregnancy is critical given the fact that it will be used in this vulnerable patient population. 