The women, aged 18 to 38, said that although they self-identified as heterosexual they had had encounters outside of this.
A third of self-identifying straight women in the same age group also said that they had been attracted to another woman.
The news adds to growing research which suggests that young women are increasingly having more fluid approaches to sexuality and gender than previous generations.
The figures were compiled as part of research carried out by Grazia and Onepoll which asked two thousand women about their views on gender and sexuality. The results suggest that women are increasingly breaking away from traditional attitudes about gender, sexuality, marriage and family life.
Only a third of women said they think marriage is relevant to their lives and 45 per cent would be open to the possibility of having a baby without a partner.
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