Your uterus grows in size during menstruation. Here's a visual that I can't get out of my head every time I feel like my uterus is going to implode from the center of me, LOL. I would assume with endo it could grow even bigger? DorrisWedding conservative wedding garment for over size ladies
http://www.wdish.com/must-see-photo-your-uterus-your-period
