cassdawg(FA2020 p633) - Basically HCG acts like FSH which stimulates estradiol production by the sertoli cells (see http://www.ansci.wisc.edu/jjp1/equine/male_endo/estrpath.html). There is no feedback inhibition since it is injected so there are elevated levels of estradiol causing gynecomastia.+15
j44nalso FSH upregs aromatase so you increase test (LH) and increase aromatase (FSH) that then converts that test to estradiol+1
submitted by โbreis(56)
HCG injections down regulate the pituitary release of GnRH.
however HCG alpha subunit can stimulate cells influenced by LH, FSH, TSH.