treatment with human chorionic gonadotropin ( hcg ) alone maintained most cell numbers within normal limits , and follicle-stimulating hormone ( fsh ) was needed in addition to hcg to maintain the normal number of cells with the amount of dna contained in primary spermatocytes and spermatogonia in g2/m-phase ( 4c ) in stages ix-xiii and elongated spermatids ( 1c ' ) in stages ii-v of the epithelial cycle .
C0007634
the
C0079396
g2