Human Growth and Development / Unit 2 HGD 0177 short lesson, about 20 seconds
Infertility
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The idea
Infertility is the failure to conceive after at least one year of trying; the WHO estimates one in six people face it at some point.
In practice
About fifteen percent of females and eleven to twelve percent of males affected.
Where people slip
Nearly half of male infertility has no known cause. Polycystic ovary syndrome is the most frequent female cause.
Your place on the trail
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