OCCURRENCE OF LOCALIZED ANOMALIES. 



199 



Our studies seem to justify the conclusion that pathological embryos, as well 

 as those which are normal in form, are very frequently associated with localized 

 anomalies and that abortion usually follows as a result of serious lesions in the 

 chorion, as well as in its environment. Should the alterations in the embryo and 

 in the chorion be very slight and the condition of the uterine mucous membrane, 



TABLE 12. Localized anomalies in normal embryos. 



which may be expressed by the term inflammation, be overcome, the pregnancy 

 in all probability would go to term and end in the birth of a monster or an infant 

 presenting a well-recognized malformation. 



I have already pointed out the difference in frequency of malformations and 

 destructive changes, as observed in the ovum, in tubal and in uterine pregnancies. 

 Since the publication of my monograph on monsters I have reconsidered the ques- 

 tion of tubal pregnancy and the specimens mentioned in the present paper are 

 recorded in detail in a volume on tubal pregnancy (Mall, 1915). 



