This link has some good general info....
It looks like HMG is mainly FSH but has a little LH....and HCG is just LH...
So it looks like it makes sense to use HCG and HMG tother....along with clomid for the best pct.
http://www.fertilethoughts.com/malpani/new/Chap23.htmlMedicines Used In Male Infertility Treatments
HMG and HCG
These are useful in stimulating sperm production in men with hypogonadotropic hypogonadism (men with low FSH and LH levels, because of hypothalamic or pituitary malfunction), but this is a rare condition.
Treatment often takes many months to restore the sperm quality to fertile levels. Combination treatment is required, with HCG stimulating testosterone production; and FSH stimulating sperm production. Initially, the man takes HCG injections thrice a week for about 6 months. This normally causes the size of the testes to increase and the testosterone to reach normal levels. HMG injections are then added. These can be mixed with the HCG and are also given thrice a week. Once sperm production has been achieved, the HMG can be stopped; and HCG treatment continued alone. While sperm counts achieved are usually low (less than 10 million per ml), a successful pregnancy can be achieved in 50 % of correctly diagnosed patients.
Unfortunately, these expensive injections are often misused as "empiric" therapy in men with low sperm counts - with expectedly disappointing results.
Bromocryptine
As in the female, this is used to lower unusually elevated levels of prolactin.
Testosterone
This is given to suppress sperm production in the hope that when medication is stopped (usually after 5-6 months), then the sperm production will "rebound " to higher levels than originally (testosterone rebound).
This form of treatment is now seldom used as it may further impair fertility and is hazardous. Testosterone is also be used for the treatment of impotence or diminished libido when blood testosterone levels are low. Testosterone is available as an oily injection and is given
intramuscularly, usually once a week. Oral preparations are also available now, but these are more expensive and may not be as effective.
Clomiphene
This is the most commonly prescribed medicine for infertile men. Its use is largely empirical and very controversial as the results are not predictable. This is usually prescribed as a 25 mg tablet, to be taken once a day, for 25 days per month, for a course of 3 to 6 months. It acts by increasing the levels of FSH and LH, which stimulate the testes to produce testosterone and sperm. The group of men who seem to benefit the most from clomiphene have low sperm counts, with low or low-normal gonadotropin levels. However, while clomiphene may increase sperm counts in selected men, it hasn't been proven effective in increasing pregnancy rates.
