From 2017: Exceptionalism is not exceptional in relation to sexual and reproduction mechanisms — Contrasts of human and animal sexuality

Exceptionalism is not exceptional in relation to sexual and reproduction mechanisms: Contrasts of human and animal sexuality. Roy J. Levin. Clin. Anat. 30:940–945, 2017. https://doi.org/10.1002/ca.22960

Abstract: Speculation that the release of oxytocin by orgasm in the human female during coitus facilitates fertility by enhancing uterine sperm transport has been criticized as having no unequivocal empirical human evidence. However, a counter claim that this supports human “exceptionalism” as some form of uterine sperm transport occurs in other species. This is a misconception as it ignores that human uterine peristalsis, powered by contractions of the smooth muscle of the archimyometrium, facilitates sperm transport even without any systemic oxytocin involvement. Moreover, examination of various unique reproductive mechanisms in numerous animals also indicates that the claim is misjudged and rests on a biased interpretation of what “exceptionalism” means in this biological context. Ten chosen aspects of our sexuality are presented as being exceptional to humans.