Someone ask if ladies cycled together if grouped together? , must not have been a female?

Question

Girls learn very early that sis/mom start together. Agroup of Friends will follow the dominate one

Answer 1

It's called the McClintock effect. The research behind it isn't very strong, but it has been noted that women who are friends or live together have cycles that are very similar.

Answer 2

Indeed they do. I've lived in dorms, with female roommates, and now I play in a sports league with 30-odd women. There are certain days of the month when you just don't mess with any of us. :)

Seriously though, this explains it a bit:

"In 1971, biopsychologist Martha K. McClintock documented that women living in college dormitories often end up with synchronized menstrual periods. Now, McClintock and colleague Kathleen Stern have evidence that pheromones are the cause.

In a series of tests at the University of Chicaco, they mixed perspiration from nine women with rubbing alcohol, and dabbed the mixture under the noses of 20 recipients. The women said they smelled nothing but alcohol, but samples taken from donors in the pre-ovulation stage of their monthly cycle, when given to women two to four days before they ovulated, shortened the recipients' monthly cycle by roughly two days. Samples taken from donors during ovulation delayed the cycles of recipients by about a day and a half.

"The study indicates there are at least two human pheromones, McClintock says--the first solid evidence that human pheromones exist at all. However, their chemical make-up, and how they work, remains a mystery. (As for why they exist: McClintock speculates that they enhanced genetic diversity in prehistoric times by ensuring that a single man couldn't impregnate all the women in a group.)"

Answer 3

I am assuming this question is related to menstual cycles, and if not, that is how I am taking this and will answer it. It is true for me and my friends. After hanging together for a while, our cycles did start occuring around the same set of dates with a couple of us on our cycles at the very same time and the same length of time.

Not sure why, but I am sure it has something to do with being emotionally connected to each other.

Answer 4

I have found that the females all change their cycle to the dominant females cycle. Check it out in a nunnery or a girls home or a female prison. The cycles change to the most dominant female.

Answer 5

Is there any documentation to prove this?