HCG IS NOT NECESSARY. BUT it IS helpful to use at end of cycle leading up to BUT NOT into PCT or you can use it during cycle to help ball size + recovery after cycle if that is a concern.
even if you go on hrt and blast and cruse its a personal choice/opinion if you should use it.
I dont care about my ball size and am on hrt when not on cycle so i dont use it.
also the doc sounds liek an ideot no offence. HCG used to keep you sterile? thats silly.
i know people that got babies while on hrt and even ON cycle. yes it causes shutdown, but it doesnt mean you cant hve kids. for some it may make it nearly impossible while others still end up getting the girl preg. kinda like with people that have never used a steroid. some have issues and others dont. if your pron to issues using aas or being on hrt will ofcourse make it worse.
but you can also do a run of hcg and/or clomid while still on hrt to up the chances of preg once ready for kid. if that isnt enough then consider taking a SHORT break from hrt while using a SERM to help put one in the oven.
