Menarche or First Blood as it is now more commonly know, is the time when a girl becomes a young women by getting her first period. This is celebrated with a Ceremony or Rite of Passage traditionally called Menarche.
Victoria De Aboitiz has written a gorgeous book called The Moon’s Gift. It’s an introductory book that welcomes girls into womanhood. Aimed at girls age 11+, the book offers a simple, kind and holistic approach to the Female Cycle.