The Fertility Clock: Why Age Matters for Both Men and Women – Ghosh Dastidar Institute for Fertility Research

Ghosh Dastidar Institute for Fertility Research (GDIFR) shared on LinkedIn:

” ‘We’ll have children when we’re ready.’

But what if your body has a different timeline?

We often talk about the biological clock as a concern for women. But there’s another part of the conversation that deserves more attention: Age can matter for men too.

• So, when does age actually start affecting fertility?
• Is 35 really a turning point?
• And why can waiting sometimes matter-even when everything seems fine?

We explore these questions, the science behind the fertility clock, and what couples should know before simply deciding to wait.

The Fertility Clock: Why Age Matters for Both Men and Women

‘We’re still young. We can think about having children later.’

It is a common thought among couples today.

Career first. Financial stability first. Building a life together first.

And then, sometimes, when the couple is finally ready to start a family, another question appears:

‘Does age really affect our chances of having a baby?’

The answer is yes – but differently for men and women.

The biological clock is not just a woman’s concern

Fertility is often discussed as though the biological clock applies only to women.

It doesn’t.

Age can influence reproductive health in both partners, although the changes are different.

For women, age affects both egg number and egg quality

Women are born with a finite number of eggs.

As age increases, the number of available eggs decreases, and egg quality can also decline. This can make conception more difficult and can increase the risk of miscarriage and certain chromosomal abnormalities.

The decline becomes more noticeable from the mid-30s and becomes more significant after 40.

But this doesn’t mean that pregnancy after 35 or 40 is impossible.

Age is a factor – not a deadline.

What about men?

This is where fertility conversations often miss an important point.

Men continue producing sperm throughout much of adult life, but sperm characteristics can change with age.

Increasing paternal age has been associated with changes in:

• Sperm quality
• Sperm motility
• Sperm DNA integrity
• These changes can potentially influence fertility and reproductive outcomes.

So when a couple is experiencing difficulty conceiving, both partners deserve to be evaluated.

Then why do some couples conceive easily at an older age?

Because fertility isn’t determined by age alone.

Ovarian reserve, egg and sperm quality, reproductive history, medical conditions, lifestyle and several other factors can influence an individual’s fertility.

That’s why one person’s experience cannot predict another person’s fertility journey.

The bigger problem may be waiting without information

Many couples don’t seek advice because they aren’t sure whether there is a reason to.

They keep thinking:

• ‘Let’s give it a few more months.’
• ‘It will probably happen naturally.’
• ‘We’re not ready for treatment.’

But seeking a fertility evaluation does not automatically mean starting IVF or any other treatment.

Sometimes, it simply means understanding your reproductive health.

When should a couple consider an evaluation?

As a general guideline:

Under 35: An evaluation is usually recommended after 12 months of regular, unprotected intercourse without conception.

35 or older: An evaluation is generally recommended after 6 months without conception.

Earlier evaluation may be appropriate when there are known fertility concerns, irregular periods, endometriosis, previous reproductive problems or concerns about male fertility.

Awareness is not about creating fear

The purpose of understanding the fertility clock isn’t to make couples anxious about age.

It is to help them make informed decisions while they have options.

Because sometimes the most important fertility question isn’t:

‘Which treatment do we need?’

It is:

‘Do we understand our fertility well enough to decide what comes next?’

At Ghosh Dastidar Institute for Fertility Research (GDIFR), we believe fertility care begins with awareness, appropriate evaluation and informed decision-making.

Understand your fertility. Understand your options.”

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