Progesterone cream is a corticosteroid treatment, and these treatments are known to cause overgrowth of Candida.
“Candida, (Candida albicans) is a fungal disease. Yeasts have become increasingly significant as pathogens in all fields of medicine. This is particularly true of those which are saprophytes (they live by eating dead tissue instead of living tissue), because of their opportunistic behavior towards the altered/compromised condition of their host. Fungi are part of the world of plants, not bacteria, and there are about 100,000 distinct types of them. 50 types cause disease in humans. In people they are common, and usually harmless companions of our skin tissues, and live as inhabitants of our mucous membranes in our mouth, vaginal tract etc. as symbiotic saprophytes. The outbreaks of acute episodes where these fungi “bloom and take over” are not due to a change in the fungi, (they are with us all the time in limited numbers) but due to a change in the hosts’ immunologic defense mechanisms. Someone who is compromised by radiation treatments, antibiotic therapy, AIDS/HIV, corticosteroid treatment etc. has a lowered ability to keep them in check, and is a prime candidate to have an outbreak of Candida.”