A study conducted by UCLA's Department of Psychiatry has revealed that the
kind of features a woman finds attractive on a man can differ depending on
where she is in her monthly cycle.
For example: If she is ovulating, she is attracted to men with rugged and
masculine features.
However, during her period, she tends to be more attracted to a man with a
spear lodged in his chest and tape over his mouth while he is on fire.
No further studies are expected. I think they tried doing a study on women
going through the change, but none of the researchers lived to tell about
it.