Scientists from the University of Gottingen conducted an experiment on 48 women aged 19 to 33 years old. They had a dance to one song. Their dances were captured on camera, and then processed so that recording only discernible movement of their silhouettes. Persons were deliberately hidden. They then asked the men to look at these videos, and say which of them are most attractive women. It turned out that almost all the dancers who gave their sympathies men that day was ovulating.
The researchers suggest that the hormonal surge in the period fertility in a certain way are working on posture, muscle movement, and women, making it the most at this time for the male sex.