Other passion-killers included poor mental and physical health or having recently had a sexually transmitted infection.
For women, having had three or more partners in a year was linked to a decline in libido alongside having children under five.
They are four times more likely to not care about having a steamy night of passion than those in shorter relationships.
But the same trend does not exist for men. Their sexual interest does not fade over time, researchers claim.
The ‘important’ findings, made by Southampton University researchers, were based on answers from 11,508 participants.
The National Survey of Sexual Attitudes and Lifestyles is the largest study of sexual habits in the UK. This was the third one undertaken.
What else did the study find?
Overall, 34 per cent of women said they lacked interest in sex, compared with 15 per cent of men, the study published in BMJ Open found.
The survey showed that both men and women were at risk of being put off sex by past experiences of forced sex.
Other passion-killers included poor mental and physical health or having recently had a sexually transmitted infection.
For women, having had three or more partners in a year was linked to a decline in libido alongside having children under five.
They were also put off regularly making love if they had different sexual preferences to that of their partner, the results showed.
What did the researchers say?
Lead author Professor Cynthia Graham said: ‘Our findings show us the importance of the relational context in understanding low sexual interest in both men and women.
‘For women in particular, the quality and length of relationship and communication with their partners are important in their experience of sexual interest.
‘It highlights the need to assess and – if necessary – treat sexual interest problems in a holistic and relationship, as well as gender-specific, way.’
Who was involved in the study?
Of the participants, 6,669 were women and 4,839 were men. They all had at least one sexual partner in the past 12 months.
Women were slightly more likely to find it easy to talk about sex than men, the research also found.
It comes after a Kinsey Institute study last month revealed how often people are meant to have sex – depending on their age.
Those aged between 18 and 29 should be having sex an average of 112 times a year. Between the ages of 30 and 39, it drops to 86 times annually, researchers said.
And sexual activity tails off even further for 40 to 49-year-olds who have half the amount of sex of their 20-something counterparts, making love 69 times a year.