Who was the author of "The Heptameron", inspired partly by Boccaccio's "Decameron"?

Question

Who was president of the Society for Constructive Birth Control and Racial Progress in England and the author of books on sexual hygiene published between 1918 and 1935 including "Married Love", "Radiant Motherhood" and "Marriage in My Time"?

Answer 1

The author of "The Heptameron" Margaret of Valois, she was a French princess of the Valois dynasty who became queen consort of Navarre and later also of France.