My Period Is Awesome teams up with a medical student to build a MENSYCLOPEDIA - a knowledge base about menstruation. It is our contribution to increase and spread knowledge about the stigmatized subject. Raquel Olofsson Falla, a medical student in Riga, Latvia, is our first guest blogger in this series. Raquel’s first post will be an introduction to the menstrual cycle. Keep an eye out for further posts in the menscyclopedia!