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It is already clear by medical researches, that in most cases (given up to 80 percent), erectile dysfunction is caused by so-called organic causes - that is, vascular and nerve, whose correct functioning is essential to achieve an erection. Intermittent failures in ######ual life may therefore indicate other serious illnesses.
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Your body then responds to these increased levels of hormones in different ways, all of which can prevent a pregnancy. It acts by inhibiting cGMP-specific phosphodiesterase type 5, an enzyme that regulates blood flow in the penis.