Blog Chicks, an Australian based fashion blog, interviews Mark Trolice, M.D., to dig deeper into what rumors surrounding the menstrual cycle are really true.

One disputed idea is that not having a period means your “lucky.” Dr. Trolice warns, “The lack of a period can result from a hormonal disorder (see PCOS) with risk of uterine cancer, as well as a serious medical problem such as anorexia, brain pituitary growth, or extreme stress with risk of bone loss and possible mortality.”

In the full article, Dr. Trolice gets to the truth on this and many other theories.