What substances are involved in controlling the production of sperm and eggs in humans

The substances that are involved in the control of sperm and egg productions in humans are the Hormones. They play important role in regulating both female and male reproductive cycles. The primary hormones involved in male reproductive system are follicle stimulating hormone, leutenizing hormone and testosterone while in females reproductive system we have Gonadotropin releasing hormone, LH, FSH, estrogen, and progesterone. The entire reproductive systems are dependent on hormones in the stimulation and regulation. 

Search on internet it may you

Iguess i would say diagrams would be most difficult subject too correct