[Dynseli]

I believe receptor regulation and feedback are different, but one might play a role in the other. I've been meaning to research negative feedback, but ended up finding a whole lot of other useful information. Different phytoestrogens don't necessarily play the same role as body estrogens for up/down-regulation. There isn't much to be found on phytohormones and receptor regulation. FSH and LH are only naturally high during ovulation. If those are resulted by negative feedback, then lowering those could possibly cause fertility issues later on. Spearmint raises FSH and LH http://www.ncbi.nlm.nih.gov/pmc/articles...objectonly . Chasteberry increases LH and decreases FSH http://www.fugh-berman.com/files/Bust.pdf .

Cycling between herbal prolactin, progestins and estrogens might possibly be good to upregulate what has been downregulated by each other, while all three stimulate breast tissue growth.