Abstract
We are in the beginning of the era of regenerative medicine and many researchers are testing adult stem cells to be used for tissue repair and regeneration in the human body. Many adult stem cells have been discovered since the late 1990’s with more recently a novel adult stem cell described in menstrual blood. The menstrual blood is derived from shedding of the endometrial lining, specifically the functionalis layer, which contains highly proliferative cells used to prepare the female body for implementation of a fertilized egg. Cell characterization experiments of stromal stem cells discovered in menstrual blood have demonstrated cells to be multipotent which can successfully differentiate in vitro into cell lineages derived from the mesoderm and the ectoderm.