إلا أن قيم هذه الميزة التي تتمتع بها الإناث اختلفت بشكل ملحوظ فيما بين البلدان والمناطق الرئيسية في العالم.
Preliminary results reveal that, as expected because of biological factors, in most countries studied boys are subject to higher risks of dying in childhood than girls; however, the size of the female advantage varies considerably among countries and between the world's major areas.