Mutations: Male Fertility Is From Mars, Female Fertility Is From Venus

About 15% of adults suffer from fertility problems, primarily due to genetic factors. This is something of an evolutionary paradox; wouldn't natural selection have caused people with infertility to not reproduce?Various theories explain the survival of harmful mutations: A gene that today causes obesity, for example may have once granted an evolutionary advantage; or a disease-causing gene may persist because it is passed on in a small, relatively isolated population. read more

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