Lamivudin var ikke teratogent i dyrestudier, men der var indikationer for en øgning af tidlig fosterdød i kaniner efter en relativ lille systemisk eksponering; sammenligneligt med hvad der set i mennesker.
Lamivudine was not teratogenic in animal studies but there were indications of an increase in early embryonic deaths in rabbits at relatively low systemic exposures, comparable to those achieved in humans.