AUTHOR S ABSTRACT OF THIS PAPER ISSUED 

 BY THE BIBLIOGRAPHIC SERVICE, AUGUST 11, 



ON THE ORIGIN OF THE CORPUS LUTEUM OF THE 



SOW FROM BOTH GRANULOSA AND 



THECA INTERNA 



GEORGE W. CORNER 



From the Anatomical Laboratory, University of California 



CONTENTS 



Introduction 117 



Recent investigations 122 



Previous work on the corpus luteum of the sow 127 



Material and methods 131 



Special cytology of the lutein cells of the sow 137 



The mature follicle 140 



The freshly ruptured follicle 148 



Invasion of the granulosa 157 



The fully formed corpus luteum, until the termination of pregnancy 168 



Retrogression of the corpus luteum 177 



Discussion 178 



Conclusions 180 



INTRODUCTION 



The history of the discussion, now of more than seventy years' 

 standing, as to the origin of the corpus luteum, has been repeated 

 so many times that it has become traditional, and the names of 

 von Baer and Bischoff have been passed down to us as the original 

 proponents of the two chief doctrines in question. It is said 

 that the former, in his monograph "De ovi mammalium genesi" 

 ('27) first stated that the corpus luteum is derived from the theca 

 interna of the Graafian follicle, and that Bischoff first discarded 

 this view in favor of the membrana granulosa as the site of origin. 

 I have not been able to see von Baer's work, but judging at least 

 from Bischoff's account of the early embryology of the rabbit 

 ('42), there was no such clear-cut opposition of view as tradition 

 declares, for Bischoff considered himself, rather, as an upholder 

 of von Baer (and was so quoted by contemporary investigators). 



117 



