CORAL SPRINGS, Fla. (AP) — Authorities say a ball python slithered out of a toilet and bit a South Florida man on the arm. Coral Springs police spokesman Chris Swinson said the man was treated ...

The aim of this report was to study the effect of sildenafil, a specific type-5 phosphodiesterase inhibitor, on human sperm motility, viability, membrane integrity and sperm penetration assay ...