A Scientific Basis for Humanae Vitae and Natural Law: The Role of Human Pheromones on Human Sexual Behavior Preferences by Oral Contraceptives and the Abortifacient Effects of Oral Contraceptives.

This article will review Humanae Vitae's predictions of the effect of oral contraceptives (the pill) on male-female relationships and societal behaviors. A scientific, biochemical basis underpinning these predictions is made. Evidence of human pheromones will be given. Evidence for the changes in male and female pheromones caused by the pill is given. Observational and experimental evidence of changes in primate and human behaviors by pheromones is detailed. The role these changes have caused in attractiveness and selection of mate by both males and females in preferences concerning major histocompatibility genes is examined. These changes have also resulted in societal changes in sexual behavior and family structure and have led to increased violence against women. Biochemical evidence for the abortifacient properties of the pill is given. The use of natural family planning is given as a needed alternative to the harms of the pill. Summary: The human biological bases of Humanae Vitae's predictions of the effect of the pill on male-female relationships are examined. Evidence of the presence of pheromones in primates and humans is given. The pill changes human pheromones, odors which are subconsciously detected. These pheromones cause humans to change what they find attractive in a mate. Choosing a mate while on the pill can result in unstable and more violent unions. The biological basis for the fact that the pill causes abortion of human embryos is given. A healthy alternative for fertility control is explained.