ioo THE PHYSIOLOGY OF REPRODUCTION 



more especially in dealing with the development and retrogression 

 of the corpus luteum (p. 373). The mammary changes are also 

 correlated (p. 617). 



THE CYCLE IN RODENTS 



Considerable attention has recently been paid to the uterine 

 changes in Rodents. In the rabbit it had long ago been noticed that 

 the uterus is swollen and congested during "heat," and the same 



FIG. 19. Section through portion of procestrous uterine mucosa of rabbit, 

 showing glandular activity, with leucocytes inside gland and passing 

 through gland epithelium. (From Blair Bell, in Proc. Roy. Soc. Med.) 



observation was made in the marmot (Spermophilus citillus). 1 Lataste 2 

 described proo?strous growth and congestion in the uterus of several 

 Muridse, and this was stated to be followed by a sanguineous discharge 

 from the vaginal opening. Lataste also described desquamation of 

 the uterine epithelium, but he appears to have regarded this process 

 as taking place independently of " heat." 



More recently Konigstein 3 has recorded cyclical changes in 



1 Rejsek, "Anheftung (Implantation) des Saugethieres an die Uteruswand, 

 insbesondere des Eies von Spermophilus citillus" Arch. f. Mikr. Anat., vol. Ixiii., 

 1904. 



2 Lataste, Recherches de Zoethique sur les Mammiferes de Vordre des Rongeurs, 

 Bordeaux, 1887. 



3 Konigstein, " Die Veranderungen der Genitalschleimhaut wahrend der 

 Graviditat und Brnnst bei einigen Nagern," Pfliigei^s Arch., vol. cxix., 1907. 



