Though one can remain ‘young at heart’ for ever, all our senses and systems have limitations. Their efficiency is inversely proportional to age. Due to various advances in medical fields, life expectancy has doubled particularly in developed countries, and also greatly increased in developing countries. There is no specific disease attributed to age. Furthermore, every individual responds uniquely to process of aging and to the complications arising due to treatment protocols in different pathological conditions. Different theories have been postulated for the process of aging. Aging can be a genetically fixed program, it may be due to spontaneous mutations that affect the regeneration and repair mechanism, it may be due to excessive accumulation of waste products like lipofuscin and free oxygen radicals, or it may be due to production of abnormal immunological products, which are not recognized by immunocompetent cells for proper disposal, hence causing irreparable damages. It is believed and proven that men retain their ability to father a child till the age as old as 95 years. Men do not go through a traditional endocrinological menopause. Until recently we had a poor understanding of the effect of aging on male fertility. As many examples have been offered of older men having babies, the thought of decreased fertility in men was never greatly addressed. It was assumed that male fertility was relatively immortal because so many elderly men have been able to impregnate their wives. However, there has been published data showing a relative decrease in sperm count, and possibly fertility, in a certain percentage of aging men. data and new conclusions.