The benefits and risks of treatment with antipsychotics during pregnancy must be weighed up carefully and individually because antipsychotics can penetrate the placental barrier and prescription is off-label. Evaluation of the risks and benefits of administering antipsychotics during pregnancy or for women who wish to become pregnant regarding teratogenic effects, risk of fetal death and stillbirths, perinatal complications, persisting postnatal impairments or disorders and gestational diabetes. Asystematic review of the literature is provided to aid the selection of psychotropic drugs during pregnancy and in determining whether to begin, continue or switch an antipsychotic treatment during pregnancy. Large, well-designed and controlled studies are missing; however, most studies suggest that the group of antipsychotics seem to be safe in terms of teratogenicity during pregnancy, at least in monotherapy. Treating mental illnesses during pregnancy requires an individual assessment of the benefits and risks. The risk of an untreated mental illness versus the benefit of asuitable treatment with antipsychotics and the potential harm to the infant must be evaluated. If certain rules are observed and asuitable antipsychotic is selected the risk to the newborn child and/or mother during pregnancy can be minimized, however, adecision about subsequent medication can only be indirectly made from the results of this study.