[The undesirable action of drugs on the embryo, fetus and newborn infant].

The up-to-date data on the negative influence of various drugs on the intrauterine development and postnatal condition of the human fetus and neonate are presented. The embryotoxic, teratogenic and fetotoxic effects of drugs are considered. The data on the teratogenic action of drugs taken not only by the mother but by the father as well, the behavioral teratology, disturbances in the condition of the neonate whose mother received some drugs during labour are given.