in this paper the results of the following experiments are briefly dealt with : ( i ) reciprocal transplantation of ovaries between young and old rats ( the term `` '' old '' '' designates here `` '' incapable of reproduction '' '' ) , ( ii ) comparison of lh and fsh binding abilities in the ovarian preparations , ( iii ) comparison of serum and pituitary concentrations of lh , fsh and prolactin and the modifications after ovariectomy or by the administration of pharmacological drugs , and ( iv ) the difference between young and old rats in intensity of dopamine fluorescence in the hypothalamus .
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reproduct
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and prola