You learn something every day, like the word "inveigh" –verb (used without object) to protest strongly or attack vehemently with words; rail (usually fol. by against): to inveigh against isolationism.

Never heard or read that word before. But, Oli, I believe you have misrepresented the Catholic Church here. They accept the "rythmn" method of birth control, which tracks the cycle of the egg being in the proper position in the uterus for fertilization. Those practicing the rythmn method would abstain from intercourse during that time. No inveighing by the Catholic Church.