This article is about how today we are producing pretty poor sperm in comparision to those of primates and other mammals. This is probably why in vitro fertilization is becoming more common these days. Epidemiologists studies have linked that low sperm counts aren't only as a result of aging but also by being too fat, too thin, lack of exercise, excessive exercise, and the list of extremes goes on and on. Basically you have to have a very healthy lifestyle to have a good sperm count. Pretty interesting, but also an easy potential fix to having to resort to IVF.
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