title: Embryo number for transfer should be regulated.
authors.forename: C J
authors.initials: CJ
authors.lastname: De Jonge
authors.forename: D P
authors.initials: DP
authors.lastname: Wolf
mesh_terms: D004624:Embryo Transfer; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D011247:Pregnancy; D018607:Pregnancy Reduction, Multifetal; D011272:Pregnancy, Multiple; D012099:Reproductive Techniques / Q000331:legislation & jurisprudence*; D012307:Risk Factors; D012926:Social Control, Formal