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40 is the new 30. Unless you want to have children.

Woman holding clock in from of her stomach to signify that her biological clock is tickingIf you were asked ‘How old is too old to have a healthy baby?’ what would you say? Here’s what some Australians said:

‘I don’t think you can be too old. I think it’s up to the individual and how they feel.’

‘I think it’s health more than age.’

‘It depends on the person.’

Unfortunately, research – and our knowledge of biology – shows that fertility IS ageist. While it’s true that there are individual differences and everyone’s heard of someone getting pregnant at 40 or older, overall, the evidence is clear. Increasing age, particularly for a woman, decreases the chances of conceiving and having a healthy child.

How age affects a woman’s fertility

A woman is born with all the eggs she is going to have in her lifetime. Her eggs age with her, decreasing in quality and quantity. That’s why age is the single most important factor affecting a woman’s fertility. While good health will help with conception and having a healthy baby, it won’t overcome a woman’s age. (If you are living in the US or visiting there, you can browse grocery needs on mobile friendly Kroger Weekly Ad.)

IVF isn’t a ‘silver bullet’, either. The older the prospective parents, the less chance that IVF will be successful. In her early to mid 20s, a woman has a 25-30% chance of getting pregnant per month. By age 40, this chance is down to 5%.

Fertility research conducted among the Hutterite women of North America, a Christian sect who don’t use contraception, found that 11% of women were infertile by age 34, 33% by age 40 and 87% by age 45.

How a man’s age affects chances of conception and having a healthy child

The age of the father also matters when it comes to a couple having a healthy child. Increased male age is associated with decreased pregnancy rates, increased time to pregnancy, and greater risk of miscarriage. Children of older fathers are also at greater risk of schizophrenia, autism spectrum disorders, and intellectual disability. The absolute risk is still small but it’s worth being aware of.

Have the conversation sooner

What can you do? You can’t control your age, but if your relationship is as you want it, you and your partner can have a conversation sooner rather than later about having a family, or adding to your family.

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13 comments so far -

  1. I gave birth to healthy twins at 44! Dad was 42. Circumstances meant we couldn’t try for a family until we were older and it took us a very long time to get pregnant but thankfully we got our little miracle x 2!

  2. I had a perfectly healthy child one month off my 40th birthday. The dad however is younger than me so maybe that helped? I have a friend that had a healthy baby at 44.

    • Hi Rebecca! Thanks for your comment. My mum had her last child at 42! There are always those who beat the odds. You’re probably right too – it might have made a difference if you baby’s father was older too. Take care. xx

  3. 32 for 1st, 36 for 2nd,39 (just) for 3rd & currently pregnant with 4th & last. With current pregnancy, I have gestational diabetes for the first time (may be age related, risk also increases with age).

  4. I think a lot of women don’t like to talk about this because the reality is, we do have limitations. We can’t do everything we want whenever we want without consequences. Best not to bury our heads in the sand about this when we are making our life choices.



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