Casual sex might not lead to orgasms for women, a new study has found.

The study was conducted by researchers led by Justin R. Garcia, an evolutionary biologist at the Kinsey Institute at Indiana University and colleagues. The team found that women in serious relationships were twice as likely to reach an orgasm when compared to those in short-term flings. The research also found that the desire for orgasm was lower in both males and females when it came to one-night stands.

The study was presented at the annual meeting of the International Academy of Sex Research.

"We've been sold this bill of goods that we're in an era where people can be sexually free and participate equally in the hookup culture," Justin Garcia, an assistant research scientist at Indiana University's Kinsey Institute for Research in Sex, Gender and Reproduction, told The New York Times."The fact is that not everyone's having a good time."

 Paula England from New York University had earlier led a study that had found that only about 40 percent of women in a casual fling reached an orgasm when compared to 80 percent of men. The study had also found that women in relationships had better chances of being satisfied with 75 percent of them saying that they had orgasm during sex.  This study was based on data from 24,000 college-aged women, The Times reported

The New York Times and The Atlantic had earlier carried articles about how women in college are engaging in short-term hook-ups.

But, are people engaging in casual sex more now than before. A recent study by Martin A. Monto, a professor of sociology at the University of Portland, found that the hook-up culture might not be a real thing. He said that college kids today aren't having any more sex than they did during the 80s or 90s.