title: Time to clarify effect of socioeconomic class on subfertility.
authors.forename: Naomi H
authors.initials: NH
authors.lastname: Pfeffer
mesh_terms: D005260:Female; D006801:Humans; D007246:Infertility / Q000191:economics / Q000209:etiology*; D008297:Male; D012923:Social Class; D012959:Socioeconomic Factors