Anew study has found that women wearing red or pink were about three times more likely to be at peak fertility than women donning other colours. In the study, researchers from the University of British Columbia asked 124 women ages 18 to 47 what colour shirt they were wearing, and when they had had their last period.

After calculating peak fertile days for each woman, the researchers found an association with red and pink shirts and fertility, the New York Daily News reported. According to the report, the researchers plan to conduct a follow-up study to further ask women why they selected a particular color on the day of the survey.

Possibilities include that women feel sexier at peak fertility and want to grab more attention, consciously or unconsciously, the researchers said.