l94 INTERNAL SECRETIONS OF THE OVARY 



of the absence of foetuses, the mammary glands undergo the 

 same development as during normal pregnancy. These ex- 



FiG. 66. — Photograph of Mammary Gland of Rabbit during 

 Pseudo-Pregnancy prolonged by anterior Pituitary 

 Extracts. 



Complete growth as found at the end of pregnancy takes place 

 during prolonged pseudo-pregnancy. 



periments show quite conclusively that the complete develop- 

 ment of the mammary gland can be brought about in the absence 

 of foetuses and is not, therefore, dependent upon any foetal 



