Hey all. I am new here and ive been reading a lot because i want to start a first cycle. Excuse my grammar, my name is Matt and I am 31 years old, male from latin america (Chile). Been training for 12 years. I got a question regarding HCG and PCT.

Ive been lurking and a lot of people just do HCG after last pin and end before/first week of PCT. Is this method better than using HCG while on cycle? (which i have seen some people do) Ive been studying about the HPG axis and how does HCG affect it, i read it mimics LH and so it produces a positive feedback on leydig cells to produce test, but wouldn't this be counterproductive when exogenous testosterone is already producing a negative feedback on the hypotalamus? Am i correct on this?

Also, i got another question regarding SERMS. Why is tamoxifen used alongside Clomifen, if both are SERMS? whats the benefit of using them together? Can you use just tamoxifen for your PCT? (I know you can and ive seen posts about just using tamoxifen) I am asking because in my country (im from Chile) Clomifen is not sold by pharmacies and you can only get it from dealers, whereas tamoxifen you can get in oficial drugstores. Am i really missing a lot if i just use Tamoxifen for PCT? What about Dosage of these drugs, why is the typical dosage 40/20 for tamoxifen and 100/50 for clomifen? I am a bit confused about dosage in general. Can anyone lead me where to read about this?

And one last question regarding AIs. I can get Aromasin in my country. What is the reasoning for using an AI after your cycle, i want to understand this. If your gonads stopped producing test, and you stopped using exogenous, what test is there to be converted to estrogens? Is an AI mandatory for when you are on cycle, too? or do i just check my bloodwork and see my e2 levels to know if i need to use an AI while on cycle?

Thanks a lot. I am just a newb in this world and want to learn as much as i can before starting.

Regards