title: Re: "The Association between living through a prolonged economic depression and the male:female birth ratio--a longitudinal study from Cuba, 1960-2008" and "Invited commentary: Natural versus unnatural sex ratios--a quandary of modern times".
authors.forename: Ludi
authors.initials: L
authors.lastname: Simpson
mesh_terms: D057172:Economic Recession / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D011157:Population Dynamics; D012744:Sex Ratio