HCG and Clomid are both utilized during PCT(Post cylcle Transition) Unless you are doing a heavy cycle you probably will NOT need HCG.Clomid is a must.
Never use HCG after a cycle as it will postpone your recovery.
HCG is to be used every 4 weeks during your cycle so your balls remember how to function and stay at a normal size.
After the cycle use clomid.