rat spermatogenic cells in stages ii-v , vii , and ix-xiii of the seminiferous epithelial cycle ( as defined by leblond and clermont , 1952 ) were quantified in numbers per standard length of seminiferous tubule by dna flow cytometry after hypophysectomy and subsequent gonadotropin treatment .
C1519449
spermatogenic cells
C0036630
seminiferous tubule