Tiny faux organs could finally crack the mystery of menstruation.

The article discusses the potential of endometrial organoids as a biomedical tool to study the poorly understood aspects of menstruation. Topics include a description of the organoids as studied by Massachusetts Institute of Technology reproductive biologist Nihan Kilinc, how the scientists made the endometrial organoids, the problem with the process of menstruation in the animal kingdom, and a brief background on menstruation research on animal models conducted by scientists in the 1940s.