When women in a confined enviroment start their period at the same time.
In a womans prison menarchy can effect the entire cell block.

Female office workers experience menarchy when their periods happen at the same time.

menstrual menstrual cycle menstruation
by The Alien God May 4, 2010
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A disease in which the female body (animal or human) produces tumors. These tumors take approximately one month to develop to appropriate size before releasing from the inner wall and becoming loose in the body. As an automatic self-defense mechanism, the body purposely wounds itself in order to capture and trap said spherical annoyances. In turn, gravity just happens to be its first option to expel these tumors from the body. It’s possible to take medication to prevent these tumors from growing, but it also beleaguers the female immune system. Surgery is included as a secondary option.
Sorry, I have Menarchial Disease so I'm in rehab this week.
by TheCheri July 27, 2010
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