As we know that age factor is directly associated with decreasing fertility in women; their eggs grow old. But age does affect the fertility level in men too. after the age of 30, there is a drop in testosterone of 1% per year. Testosterone is the energy, the hormone that you need to make good-quality sperm. It’s not just women who have to worry about their ticking reproductive clock. Men's sperm quality seems to decline after the age of 35. The older a man is the more his sperm cells are dived, and the more divisions present, the more there is a chance for an abnormality to occur.
Studies have shown that age of male is directly associated with a decline in semen volume, sperm motility, and sperm morphology. Many studies have claimed that pregnancy rates decrease between 23% to 38% in comparisons between men under 30 and men over 50. Sperm count declines with age, with men aged 50–80 years producing sperm at an average rate of 75% compared with men aged 20–50 years. Increased paternal age has also been correlated to schizophrenia-(impaired thinking, emotions, and behaviors).
On the other hand, men that maintain a low body weight with a B.M.I. of less than 20, will also have decrease in sperm count. An ideal B.M.I. is be between
