Over a period of eight years, 61 patients with toxoplasmosis infection in pregnancy were examined retrospectively at women's hospital. Diagnosis of maternal infection was based on seroconversion, positive IgM, raising IgG--titers above twofold, and very high primary titers in SFT. In 20 patients (32.8%) diagnosis was found with seroconversion. In 15 patients (24.6%) the first examination revealed very high titers (SFT > or = 1:2000, KBR > or + 1:40)> Using a score, time of infection was grouped into: periconceptional (24.59%), 1st Trimester (34.43%) 2nd Trimester (31.14%), 3rd Trimester (4.92%), not specified (4.92%). The latency phase between first suspect titer and treatment did vary markedly. Duration of latency phase was longer than 6 weeks only in 10% and 20% of cases identified via seroconversion or very high titers respectively. Of all cases with different diagnostic attempts 73.9% were treated later than 6 weeks after the first suspect titer. Therapy was performed with either a combination of pyrimethamine-sulfadiacine or spiramycin monotherapy. In 18/53 newborns (33.9%) fetal infections were proven with IgM-detection post partum. Clinical evaluation was normal in 48 children (77.5%). 6 newborns (9.7%) had dilated cerebral ventricles; 3 (4.8%) had irregularly dense intracerebral structures, one newborn (1.6%) had intracerebral calcifications. Primary neurological check-up of the newborn was normal in 91.9%. 2 children (3.2%) had facial paralysis or reduced muscle tonus. In 2 newborns (3.2%) opthalmological examination of the fundus revealed signs of retino-chorioditis.