Fertility Process, Please Explain

Hello guys. I am looking to better educate myself. Was curious if someone could reply with a more simple english explanation of how the body produces sperm. What roles LH FSH, test, whatever hormones play a role in regards to taking hCG along with TRT to become fertile. When on TRT your body stops producing which hormones, and you take hCG to bring named hormones back up, which tells your gonads to work.

Hope that makes sense.