Infertility is defined as trying to get pregnant (with frequent intercourse) for at least a year with no success. It can also be defined as Inability to conceive despite regular uninterrupted sexual intercourse for a period of atleast one year.
Female infertility, male infertility or a combination of the two affects millions of couples globally.

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https://www.nursingblog.com.ng/infertility-causes-tests-and-treatments/