456 



F(ETAL BYHTOKIA. 



There are other complications of a similar kind in this presentation, to 

 remedy which the practitioner must exercise his judgment by resorting 

 to rectification of the misplaced parts, so as to effect delivery in the 

 anterior presentation ; to version, so as to bring about a posterior pre- 

 sentation and then deliver ; or to embryotomy, in order to reduce 

 the size of the foetus, and thus have more room for manipulation and 

 removal of the body. 



CHAPTEE II. 

 Dystokia in the Posterior Presentation. 



Though parturition may take place spontaneously and terminate 

 favourably w^hen the foetus presents posteriorly and in a normal posi- 

 tion, yet as in the anterior presentation so in this — the presentation 



Fig. 138. 

 Lumbo-Sacral Positiox. 



may be natural but the position abnormal ; or, though both be normal, 

 yet delivery may be interfered with by deviation of some part- such as 

 the fore-limbs or head. Not only may this be the case, but the pre- 

 sentation itself may be unnatural. 



Several authorities alluded to by Saint-Cyr mention deviation of the 

 tail of the foetus as ofi'ering an obstacle to birth in this presentation, 

 lumbo-pubic position ; and it is admitted that such may be the case if 

 that organ gets below the thin margin of the pubis, and becomes bent 

 down towards the croup ; but this should be easily remedied. 



When treating of the mechanism of parturition (p. 250), it was 



