By Minou Arjomand, current Visitor in the School of Social Science:
"On the last day of 1930, the pope promulgated the Casti Connubii encyclical which forbade Catholics from using contraceptives and reaffirmed the Catholic Church’s stance against abortion. Then, in February 1931, two doctors, Friedrich Wolf and Else Kienle, along with 300 of their patients, were charged with violating the abortion ban."