Why couples in their 20s are facing fertility issues once seen only in their 30s

It is no longer unusual for couples in their mid to late 20s to face difficulties conceiving – a phenomenon once almost exclusively related to the 30s or beyond. Recent data suggests that infertility is not a problem solely of advancing age. According to the World Health Organization, around one in six people globally suffer from infertility at some point in their life.

Dr Rohani Nayak, Fertility Specialist at Birla Fertility & IVF, Bhubaneswar, says such numbers challenge the long-held belief that fertility concerns begin only after 30. So, what has changed and why are younger couples increasingly affected?

Lifestyle, environment and hidden biological stressors

Part of the answer lies in shifting lifestyles. A growing body of research links factors such as poor diet, obesity, lack of exercise, alcohol, smoking and environmental pollutants to impaired reproductive health for both men and women.

Moreover, modern environmental exposures and sedentary behaviour may be contributing to subtle biological stressors. For instance, some recent research flags concerns about electromagnetic radiation, from prolonged use of certain devices, potentially affecting sperm quality. 

These influences do not wait until age 35 or 40. When compounded, they can begin compromising fertility much earlier, reducing both egg quality in women and sperm health in men, often before couples realise there is an issue.

Ovarian reserve is finite and variable

Biologically, every woman is born with a fixed number of eggs (non-growing follicles, or NGFs) that decline gradually over time. One widely referenced model estimates that by age 30, many women retain only about 10–15% of their maximum pre-birth NGF count. 

Thus, while age remains a critical factor, the baseline from which decline begins can vary significantly and lifestyle or environmental stressors may lower the effective reserve or damage gamete quality. The result: fertility issues emerging even in what used to be considered ‘safe’ age brackets.

What it means for couples considering IVF

For couples in their 20s experiencing unexpected delays in conception, this evolving reality underscores the importance of early evaluation of ovarian reserve, lifestyle review, and prompt consultation with a fertility specialist. What previously might have been dismissed as a ‘later-in-life’ problem now deserves attention far sooner. Early detection and intervention can preserve reproductive potential and guide couples better – rather than waiting until their 30s.

In short: fertility is not guaranteed merely by youth. It is shaped by a complex interplay of biological, lifestyle, and environmental factors and couples should be aware that vigilance now may preserve possibilities.