Chorion villus sampling in Europe.
D000028:Abortion, Induced; D002824:Chorionic Villi; D002986:Clinical Trials as Topic; D003582:Cytogenetics; D004992:Ethics, Medical; D005060:Europe; D005260:Female; D030342:Genetic Diseases, Inborn / Q000175:diagnosis*; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011296:Prenatal Diagnosis; D011897:Random Allocation; D012042:Registries; D012306:Risk; D014944:World Health Organization