If you're turning thirty then, beware! According to a study carried by Utah psychologists, many women become lesbians when they hit their thirties, said researchers.
According to the research, girls' sexual orientation becomes more relaxed as they get older, so much so that many go on to become bi-sexual.
Though most textbooks assume that women's sexual preferences are fixed in their early twenties - the same as men - and rarely change later in life.
Lisa Diamond, Utah psychologist, who tracked 100 women for more than ten years, found their sexuality became more fluid with age.
The findings will be presented at the American Psychological Association next month.