CHANGES IN NON-PREGNANT UTERUS- 99 



stroma, but apart from this circumstance the nnicosa shows no 

 resemblance to that of the procostrous stage, for the gland epithelium 

 is either broken down or else new and attenuated instead of being 

 columnar like that of the bitch during " heat." The complete series 

 of changes occurring in the pseudo-pregnant uterus are in a general 



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FIG. 18. Section through uterine mucosa of bitch forty-eight davs after 

 the end of proa-strum (retrogressive stage of paeudo- pregnancy). Many 

 of the glands are degenerating ; their luinina contain colloid ami the 

 remains of desquamated epithelial cells. K\ti;tvasat'd Mood is s.-t-n 

 in the stroma. (From Marshall and Hainan.) 



way similar to those occurring in the pregnant condition. In tin- 

 latter the secretion coming from the glands is a source of nutriment t< 

 the fcctus (see p. 444). Decidual cells (pp. 4r:!-r-7j are not normally 

 found in any of the Carnivora. Tin- di-gt-nerative changes which 

 occur at the close of pseudo-pregnancy aie perhaps eomparalile to 

 those taking place in the uterus in association with parturition. 

 The entire seijuenci- of uterine changes are correlated with the 

 contemporaneous series of ovarian chaniM-s. ;ls pointed nut In-low. 



