Progesterone is mildly anti-estrogenic in that it reduces the number of estrogen receptors, increases metabolization of estradiol to estrone or inactive components BUT also stimulates certain structures in the breast, can have a relaxing effect thus helping things work better in the body. Progesterone counters dryness/brittle nails from estrogen, has a diuretic effect vs. water retention for estrogen, aids in further fat accumulation (i.e. buttocks), etc....SO, really, whether, in the end, it benefits you more than harms you, one cannot say in advance, one must try it with doctor's agreement. For me, so far, it's been good, I think.

Also, that link is not scientific and progesterone is not well absorbed in the blood when applied as a cream, especially in over the counter creams that are too weak. There are no solid references so, don't believe everything you read. Research, read and read. Pay attention to the smallest details, even studies can be biased, not well conducted, etc. Always keep your critical hat on, even when discussing with experts, doctors, etc.