Vatican City, Feb 3, 2018 / 05:00 am (CNA/EWTN News).- Since Bl. Paul VI’s encyclical Humanae Vitae was published 50 years ago, it has sparked wide-ranging debates, and frequent calls to change its teaching from some theologians.

At the 50th anniversary of the encyclical, some theologians have again begun calling for a reinterpretation of the document, or suggesting that adhering to it may be morally impossible for some Catholics.