If youre interested in having a kid right now it would be much simpler to do that before going on a cycle. If you do go on with the cycle hCG is a good idea, but not a guarentee.
Many guys remain fertile while on cycle and many (most?) regain fertility after coming off. But there are always those unfortunate stories of guys who wind up with permanent damage or arduous recovery periods.
Theres always the option of freezing some sperm and then dropping a few grand on IVF