 Date: 2012-12-24 16:04:58Science Andrology Infertility Obstetrics Google Trends Birth control Google Search N-gram Pregnancy Fertility Demography Medicine | |  Google evidence of increasing prevalence of subfertility (difficulty to get pregnant) by trends in searches and in published books ©Vaclav Kirsner bioZhena Corporation Let us first review the medical definition of the s
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