THE PITUITARY BODY 



of increased secretory activity — particularly in the seminal 

 vesicles and the coagulatory gland of the prostate. In the 

 testis, precocious spermatogenesis was not produced, nor did 

 the interstitial tissue appear to have undergone a greater 

 growth than the seminiferous tubules (see Figs. 30-32). 



Fig. 30. — Part of the genital tract of littermate male rats, 28 days old. Scale in 

 cms. Upper: testes, etc., of rat receiving a total dose of 36 mg. of an extract of 

 sheep pituitary injected as 2 mg. twice a day for 9 days (19-27 days). The "unit" 

 of this extract in the immature female rat was 3.5 mg. Weight of both testes, 523 mg. 

 Weight of seminal vesicles, 31.0 mg. Body- weight, 60 g. Lower: testes, etc., of 

 normal rat. Weight of both testes, 384 mg. W'eight of seminal vesicles, 11.5 mg. 

 Body-weight, 66 g. 



Implants of the anterior pituitary of the guinea pig were 

 without effect on the genital tract of the immature male rat 

 (two animals). 



The only effect of implants (14-35 days) in adult male 

 mice and rats appeared to be an increase in sexual activity. 

 The experience of others^ who have investigated the effects of 



s Steinach and Kun, Voss and Loewe (1928) ; Martins (1929) ; Borst and Gostimi- 

 rovic (1930); Evans and Simpson, Moore and Price (1931); and Engle (1932). 



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