This sounds super romantic, but it’s not true. According to studies, simply being around other women doesn’t mean your periods will synchronize.
Personally, I wouldn’t risk it. When you go in the water or take a bath, the flow of menstrual blood stops due to the temperature difference. However, some people believe that gravity stops the flow and makes it harder for the menstrual flow to be expelled.
Currently, no direct relationship has been discovered between fertility and the regularity of men