Vaping and trying for a baby? Heres the truth: In men, it can lower sperm count, motility + Vaping versus smoking's impact on male fertility A recent scientific study reveals that vaping may reduce sperm count and shrink testicles. The study's authors noted, It should be considered that although [e cigarette] liquid has been introduced as harmless in Vaping can shrink testicles, cause sperm counts to plummet: study