Toxoplasma gondii infection is one of the most popular human zoonosis. Presented is the epidemiology and clinical symptoms of toxoplasmosis with particular attention to infection during pregnancy. The paper presents the life cycle of Toxoplasma gondii, routes of transmission and clinical manifectations. The scheme of diagnostic and terapeutic procedures in case of infection during pregnancy is discussed. Congenital infection, serologic diagnostics and clinical symptoms have been described. Treatment of congenital toxoplasmosis is also presented.