I have read some posts about the possibility of using a SERM like clomid or tamoxifen instead of HCG in order to keep tests functioning while on TRT. I did an experiment and just wanted to post my results (take the information as is and hopefully it helps to answer some questions you might have).
I started TRT using testosterone cream and no HCG. After a few months both LH and FSH levels were undetectable. Had a fertility test done and came back with zero sperm. I started tamoxifen (10mg daily) to get rid of a small lump in one of my nipples. After one month i got blood work done and LH and FSH still undetectable. So at least for me, with 10mg of tamoxifen daily for 1 month... No impact in LH or FSH levels. However it seems like my testicles size increased a bit during this month of taking tamoxifen. I recently started HCG so lets see if fertility comes back.
I started TRT using testosterone cream and no HCG. After a few months both LH and FSH levels were undetectable. Had a fertility test done and came back with zero sperm. I started tamoxifen (10mg daily) to get rid of a small lump in one of my nipples. After one month i got blood work done and LH and FSH still undetectable. So at least for me, with 10mg of tamoxifen daily for 1 month... No impact in LH or FSH levels. However it seems like my testicles size increased a bit during this month of taking tamoxifen. I recently started HCG so lets see if fertility comes back.