The quip “It’s all downhill from here” often finds its way into many a best man’s speech. However, new findings indicate that it might be more applicable to women post-marriage.

Recent research reveals that women experience a decline in happiness after tying the knot, with their happiest moments occurring when cohabiting and anticipating future nuptials.

The study highlights that while marriage can initially boost happiness, this effect is fleeting, typically vanishing within a year and dropping below levels experienced before the wedding.

Conversely, for men, happiness peaks when they are married or in a committed live-in relationship, according to the findings.

To reach these conclusions, sociologists analyzed data from a sample of 2,820 individuals who were questioned about their life satisfaction, overall health, and mental well-being over an 18-year span.

Sociologists looked at 2,820 people who were surveyed about their life satisfaction, general health and mental health over 18 years.

These people were also asked to rate their likelihood of marrying their current partner if they lived with them.

Women who said it was likely or very likely they would marry the partner they lived with had the highest level of life satisfaction, which they rated on a scale of one to ten.

A study of life satisfaction found women’s peak happiness tends to be when they are living with their partner and planning to get married in future

For those who do marry, any boost is short-lived, disappearing after a year and falling below pre-wedding levels, according to the research

But life satisfaction was significantly lower for women who were married, or who lived with a partner but thought marriage was unlikely, and lowest in single women.

Professor Belinda Hewitt, who led the research from the University of Melbourne, said: ‘There can be a lot of excitement and anticipation around the prospect of getting married in the future, with several fun things to look forward to like a wedding day and honeymoon.

‘That provides a real sense of purpose for a relationship, and the reassurance that the other person is very committed, which could be very satisfying for cohabiting women in this position.

‘Marriage is also a committed relationship but the anticipation of the wedding and the “project” of planning for it are gone, and replaced by a lot of expectation and pressure.

‘This may explain why life satisfaction after marriage doesn’t measure up for women, compared to when they are living with their partner and thinking about getting married.’

Professor Belinda Hewitt, who led the research from the University of Melbourne, said there can be a lot of excitement and anticipation around the prospect of getting married in the future

The general self-reported health of women, judged using questions including how healthy they felt and whether they fell ill more often than others, improved significantly when they went from being single to living with their partner and expecting to get married.

But this health boost was not seen when they moved in with someone and thought marriage to that person was unlikely.

Men saw no significant change in their general health if they changed relationship status.

The research looked at people aged 18 to 44 who were single when they first answered a household survey sent out to people in Australia.

They were asked to give a score between zero (not at all satisfied) and 10 (completely satisfied).

The average score for single women was 7.49, and this rose to 7.75 for women who lived with a partner and did not expect to get married.

The score was only 7.74 for women who were married.

But among those who were cohabiting and likely to marry, women reported a significantly higher average life satisfaction score of 7.89.

Publishing the findings in he journal Social Sciences & Humanities Open, it concludes that ‘anticipating marriage’ but not yet being married appears to be the best relationship state for women’s wellbeing.