Sertoli Cell-Only SyndromeSertoli CellsSpermatogenesisTestisSyndromeSertoli Cell TumorSeminiferous TubulesSeminiferous EpitheliumBlood-Testis BarrierDown SyndromeMetabolic Syndrome XSpermatidsFollicle Stimulating HormoneSpermatogoniaSpermatocytesLeydig CellsCells, CulturedSexual MaturationNephrotic SyndromeReceptors, FSHSpermatozoaSjogren's SyndromeTestosteroneAndrogen-Binding ProteinCell DifferentiationTesticular HormonesTurner SyndromeRNA, MessengerInhibinsImmunohistochemistryGerm Cells