This inexpensive but extremely useful annotated edition of Pope Paul VI's encyclical Humanae Vitae includes a foreword by Helen Alvaré, as well as helpful notes by Sr. Marianne Lorraine Trouvé, which enable modern readers to more fully understand the document's wisdom and guidance. Over time, the impact and prophetic nature of Humanae Vitae has become more apparent, and the 50th anniversary of this document is an important moment in the life of the contemporary Church.