Myths vs facts: Progesteron and Stress

Progesterone is often called a 'calming hormone' because its metabolite allopregnanolone acts on GABA-A receptors, producing anxiolytic effects. However, the relationship is nuanced: a common myth is that progesterone always reduces stress, but in reality it can cause mood swings, irritability, or depression in some individuals (e.g., during the luteal phase or with hormonal contraceptives). Fact: chronic stress activates the HPA axis and can alter progesterone synthesis via the 'pregnenolone steal' phenomenon, where precursors are diverted toward cortisol production. Evidence from human observational studies and animal models indicates that the interaction is bidirectional and context-dependent. The provided knowledge context does not address progesterone or stress directly, so this answer relies on established endocrinological knowledge. Evidence level: human-moderate.