Building on the renewal of Thomistic ethics encouraged by key moral encyclicals including "Humanae Vitae", "Veritatis Splendor", and "Evangelium Vitae", Martin Rhonheimer revisits some of the most difficult questions regarding the ethics of procreation and human life. The book offers a rigorous argument on the contested question of contraception and related matters, and similarly engages disputed questions surrounding abortion. With Rhonheimer's characteristic circumspection and rigor, his discussion of sexual ethics provides compelling argumentation in support of Catholic teaching against contraception. He applies this analysis to the related case of using contraceptives under the threat of rape. Rhonheimer agrees with trusted Catholic moralists, who from the early 1960s to the present have concluded that such use would be licit. He shows, moreover, both the flaws in alternative analyses and how the same conclusions can be reached in a defensible manner while upholding the teachings of "Humanae Vitae" and "Veritatis Splendor".Rhonheimer applies his philosophical acumen to another set of difficult moral questions about contemporary threats to the sanctity of human life, including artificial reproduction and abortion. Regarding artificial reproduction, his treatment further illustrates both the fecundity of his application of Thomistic virtue and action analysis and his insistence on the moral link between sex and procreation. Finally, he not only provides a rigorous rebuttal of some of the leading arguments justifying abortion, but offers readers an example of his writings in political philosophy through a profound reflection on the defense of human life in a constitutional democracy. This is a rigorous philosophical analysis of some of the most disputed questions in Catholic sexual ethics.