Tadacip 20 mg is not generally known to cause infertility in men. It contains tadalafil, a medicine used to treat erectile dysfunction. Tadalafil helps increase blood flow to the *****, making it easier to achieve and maintain an erection. It does not directly increase sperm production or testosterone. Regarding male fertility: Sperm count: There is no strong evidence that tadalafil causes a reduction in sperm count at usual prescribed doses. Sperm quality and motility: Studies have not established a consistent harmful effect on sperm quality. Research on long-term use is more limited. Testosterone: Tadalafil is not a testosterone-lowering medicine. Ability to conceive: By helping with erections, it may help some couples have ***** when trying to conceive, but it does not directly improve fertility. One important detail: official prescribing information notes that sperm concentration decreased in some studies of men taking tadalafil daily for 6–9 months, although the clinical significance is unknown. The studies did not show consistent harmful effects on sperm movement or shape