62 



Diseases of the Genital Organs 



peritoneal cavity, is very narrow and the peritoneal cavity 

 is assumed to be physiologically sterile, the embryo lying in 

 the genital tube betvs^een the tubal and cervical openings, 

 once the uterine seal is physiologically formed, enjoys a high 

 degree of safety in these directions. Two vital dangers 



Fig. 30 — Same as Fig. 29, sho'wing a different type of Placental 

 Crypts with thickened, fibrous partitions possibly- 

 due to prior disease, 



remain. There is constant peril to the embryo from bacte- 

 ria, already old habitants of the utero-cervical cavity, and 

 there is a further threat of unknown potentiality from 

 micro-organisms floating in the blood of the mother, which 

 may invade the uterus from the blood stream. These dan- 



