Does Smoking Weed Affect Sperm Count or Cause Infertility? PACE How Does Smoking Reduce Sperm Quality? Your fertility matters and smoking can silently harm it more than you think! Cigarette toxins cause oxidative stress, which can: Q&A: "Does Smoking Weed or Vaping Affect Sperm?" Is smoking speeding up your fertility clock? Thinking about having kids now, or later? Smoking, vaping, and cannabis can affect both egg and sperm health and may even shorten the time