When we hear about the biological clock, we automatically link it to women. There is an expiry date on women's fertility; the majority of women experience menopause at 45–55 years of age, marking the decline of their natural fertility. But what about men? Is there a reproductive "expiry date," or does male fertility last a lifetime? It is a question that is even more relevant in India today, when parenthood is being delayed by many due to professional ambitions or late marriage. Unlike women, men never experience a sudden and complete loss of their ability to reproduce. Sperm production goes on until older age, though sperm quality and quantity slowly start to deteriorate. Based on research, male fertility declines after the age of 40. Though some men do become fathers in their 50s o

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