Adult leydig cells are originated from
Fetal Leydig cells atrophy after bih and do not contribute to the origin of adult Leydig cells, which originate from undifferentiated progenitor cells that appear in the testis after bih and acquire full steroidogenic function during pubey. Ref Harrison 20th edi page no 2769
Fetal leydig cells
Undifferentiated progenitor cells which appear in testis before bih
Undifferentiated progenitor cells which appear in testis after bih
All of the above
Endocrinology