title: [Genetic and peristatic aspects of research on twins].
abstract: The incidence of multiplets according to Hellin is no more valid in the last years. The reasons have been discussed. Different comprehensions about the valence of the different methodic variants of twin research have been explained.
authors.affiliation: Institut für Biologie, Bereichs Medizin, Martin-Luther-Universität, Halle-Wittenberg.
authors.forename: H A
authors.initials: HA
authors.lastname: Freye
mesh_terms: D001724:Birth Weight; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy; D011272:Pregnancy, Multiple; D012106:Research; D014428:Twins, Conjoined / Q000503:physiopathology; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic
vernacular_title: Genetisches und Peristatisches zur Zwillingsforschung.