Survival of the females (EurekAlert, 18 December 2012)

More brothers could mean faster sperm and better fertility (University of Sheffield press release, 19 December 2012)

Global rates of infertility remain unchanged over past 2 decades (EurekAlert, 18 December 2012)

19 Dec 2012

A World Health Organisation study published in PLOS Medicine uses 277 national surveys to investigate global trends in fertility over 20 years.

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