How male fertility profile can change with time?

ICSI is advised for male infertility

Men continue to produce sperm throughout their lives, a man’s decrease in sperm characteristics occurs much later. Sperm quality deteriorates somewhat as men get older, but it generally does not become a problem before a man is in his 60s. there is no maximum age at which a man cannot father a child, as evidenced by men in their 60s and 70s conceiving with younger partners. However aging men may develop medical illnesses that adversely affect their sexual and reproductive function. Alcohol, Obesity and diabetes can affect sperm quality which are acquired due to lifestyle changes over time. Sperm production can deteriorate with increasing period of smoking and previously fertile men can experience infertility problems.