This page collects physiological evidence of various intriguing shifts that take place after sex, beyond the neuroendocrine shifts already addressed on other pages. Also see Evidence of shifts after sex.

Humans

Orgasmic frequency and plasma testosterone levels in normal human males

Sexual Frequency and Salivary Immunoglobulin A (IgA)

Effect of Frequency of Emission on Semen Output and an Estimate of Daily Sperm Production in Man

Evidence for Masturbation and Prostate Cancer Risk: Do We Have a Verdict?

Animals

Sexual behavior suppresses the primary antibody response in the golden hamster

Mating suppresses splenic natural killer cell activity in male golden hamsters

Male semelparity and multiple paternity confirmed in an arid‐zone dasyurid

Ejaculate Economics: Testing the Effects of Male Sexual History on the Trade-Off between Sperm and Immune Function in Australian Crickets

Sperm competition drives the evolution of suicidal reproduction in mammals

Alpha male status and availability of conceptive females are associated with high glucocorticoid concentrations in high-ranking male rhesus macaques (Macaca mulatta) during the mating season