HCG and HMG go back a long ways. Both actually stimulate LH and FSH its just the HMG stimulate FSH more and LH less. Thus HMG is not as effective at HPTA recovery but works better once recovery occurs to stimulate increased sperm production. HMG has been used for years to increase sperm count but more emphasis on LH is necessary for recovery hence the use of HCG.
P

