Follicle Stimulating Hormone (FSH) is an essential reproductive hormone that acts in gonadal maturation and gamete production. This hormone has been identified in mammals (including humans), reptiles, and birds and has many homologous structures and functions between species. The FSH receptor gene has been mapped on chromosome 2 p21 in the human (Simoni, Gromoll, Nieschlag 1997). Sertoli Cell only Syndrome (SCOS) has been identified as a cause for low sperm count in men. Several studies reported the possibility to conceive after treatment of the male patient with folliclestimulating hormone for a period of time. Ongoing research being conducted on this disease shows that those affected by SCOS now have the opportunity to procreate with medical assistance.