The most common age for women to have children is now 31 – a decade older than their mum’s generation

The most common age for women to have children is now 31 – a decade older than their mum’s generation

The most common age for British women to give birth is 31, according to new official figures. That’s ten years later than their own mums. At the same time, the size of the average family is on the rise. A leading expert says increased access to fertility testing could account for changing attitudes.

New figures released this month by the Office for National Statistics (ONS) reveal that women are having children later compared to previous generations. Researchers looked at women who have now completed their families and discovered that the most common age for them to give birth was 31. For their mums, it was a whole decade earlier.

Despite this rise in the most likely age for women to have a child, the average family size is now creeping up after recent record lows. A leading health expert says increased access to fertility testing means women can safely plan to have children later in life, once their careers have been established and they have a settled lifestyle.

Dr Avinash Hari Narayanan (MBChB), Clinical Lead at London Medical Laboratory, says: ‘The latest official childbearing figures look at “completed families” by focussing on women born in 1977. That’s because after the age of 45 the number of women giving birth is relatively small and does not affect the overall patterns, says the ONS.

‘The most likely age for a woman born in 1977 to give birth was 31. Her mother, however, was probably born around 1950 and most likely gave birth in her early twenties. That’s huge social and biological changes in childbirth patterns.

‘However, the figures reveal that having children later doesn’t necessarily mean that families are getting smaller. In fact, there has also been a rise in average family size, showing that increased access to fertility testing and improved maternal health outcomes, means women can safely enlarge their families at a later age.

‘Women in England and Wales who were born in 1977 have an average completed family size of 1.94 children. That follows on from an all-time low of 1.89 children for women born in 1972 and 1973. There has been a slight increase in the average completed family size for four consecutive years. The current average of 1.94 was last seen 15 years ago, for women born in 1962. 

‘However, today’s average family size still has some way to go to match our parents’ generation. Women born in 1950 had an average family size of 2.07 children. 

‘The new data also looks at British women aged around 30 (born in 1993) to see how their family patterns are developing. 44% of them have had one or more children before 30 years of age. This compares with 58% of their mother's generation (born in 1965) and 81% of their grandmother's generation (born in 1938).

‘These fascinating figures show that women now have increased confidence in information surrounding their fertility. Easier access to improved testing means they can plan families with greater certainty than ever before. A woman can now build her family around positive choices such as establishing her career or choosing to settle with a partner later in life.

‘Fertility hormones testing gives highly accurate measurements for vital hormones like oestrogen, progesterone, testosterone, luteinizing hormone (LH) and follicle-stimulating hormone (FSH). These are all vital for sexual development and reproductive function.

‘Indeed, London Medical Laboratory’s own “Fertility Hormones Profile” test is an at-home, finger-pick blood test that checks levels of key hormones related to fertility, menopause, period problems and other hormone-related issues. 

‘Hormone imbalances or deficiencies may be to blame for a wide range of symptoms and conditions. Testing can identify imbalances that could impact fertility, growth and development, mood and cognitive functions.

‘The Fertility Hormones Profile test can be taken at home through the post, or at one of the many drop-in clinics that offer this test across London and nationwide in over 120 selected pharmacies and health stores. For full details see: https://www.londonmedicallaboratory.com/product/fertility-hormones-profile