title: [Single embryo transfer reduces pregnancy risks].
authors.affiliation: Väestöliiton lapsettomuusklinikka Kalevankatu 16 A 00100 Helsinki.
authors.forename: Sirpa
authors.initials: S
authors.lastname: Vilska
authors.forename: Hannu
authors.initials: H
authors.lastname: Martikainen
mesh_terms: D004624:Embryo Transfer / Q000639:trends*; D005260:Female; D006801:Humans; D007247:Infertility, Female / Q000628:therapy*; D011247:Pregnancy; D011272:Pregnancy, Multiple; D012307:Risk Factors; D016896:Treatment Outcome