the present results sustain and further extend our previous assumption that the relative proportions of newly synthesized and recovered delta4-3-oxo-c21-steroids in testicular incubates in vitro , especially 20alpha-dihydroprogesterone and 17alpha-hydroxyprogesterone , are primarily related to the individual degree of physiologic gonadotrophic stimulation at the moment of testicular biopsy , and less related to an unspecific maturation of various steroid metabolic enzyme systems .
C0033006
c21-steroids
C0038317
steroid