The worry isn’t just that global birth rates are plummeting, it’s that fertility rates are plummeting along with them. Especially male fertility rates. Sperm counts and quality have been on a steady ...

Male fertility is on a decline worldwide—and cat poop might have something to do with it. New research suggests that Toxoplasma gondii, a common parasite spread primarily through infected cat feces, ...

Toxoplasma gondii, a parasite spread by cats, can shred human sperm and may be an overlooked factor in declining male fertility, according to new research. Reading time 4 minutes Male fertility rates ...

Toxoplasmosis is a disease that's killing off native animals and marine life, and some experts believe cats may be to blame. Experts at a public forum held at the University of Hawaii Saturday ...