Cal thinking, then u will figure things out for what happened not too long ago. When I googled this question: How does androgen and estrogen affect bone growth? Androgens increase radial growth, whereas estrogens decrease periosteal bone formation. This effect of androgens may be important because bone strength in males seems to be determined by relatively higher periosteal bone formation and, therefore, greater bone dimensions, relative to muscle mass at older age. Note: Back in January 2015, before the UFC partnered with USADA, the Brazilian super star failed a drug test for the steroids drostanolone and androsterone in an in-competition test for his fight against Nick Diaz at UFC 183. Silva was suspended by the Nevada Athletic Commission for one year. So it’s very possible that USADA is working in reference to what happened recently or not? So what do u really think about USADA?