[Antibiotic use in pregnancy. II].

Tetracyclines are antimicrobial agents that must be avoided during pregnancy. Metronidazole has showed to be carcinogenic in animals like mouse, but in humans this effect has not been proved. In developing countries the tuberculosis has a high prevalence, so tuberculosis in pregnant women isn't a rare event, all of this patient must receive antituberculosis agents. Of the extensive group of antiviral agents only few has proved clinical efficiency, of this acyclovir can be used during pregnancy with caution. At his moment there aren't sufficient information about the utility of zidovudine in pregnant women.