title: Males and females--some vital differences.
abstract: More boys are born than girls, yet at older ages women far outnumber men. This article quantifies, for England and Wales, how and why this disparity in the sex ratio varies with age, and looks at changes over the course of this century. The differences between male and female mortality and migration--which lead to these imbalances in numbers--are also set out.
authors.forename: J
authors.initials: J
authors.lastname: Craig
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D001723:Birth Rate / Q000639:trends; D002648:Child; D002675:Child, Preschool; D015331:Cohort Studies; D004641:Emigration and Immigration / Q000706:statistics & numerical data / Q000639:trends; D004739:England / Q000453:epidemiology; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D009026:Mortality / Q000639:trends; D011156:Population Density; D012744:Sex Ratio; D014852:Wales / Q000453:epidemiology