232 



NORMAL PARTURITION. 



2. Right Cephalo-ilial Position. — This is the reverse of the preceding. 



Saint-Cyr, who has mainly followed Rainard in the definition of these 

 presentations and positions of the foetus, insists on the necessity for 

 studying them carefully, as by so doing those who commence the prac- 

 tice of obstetricy will be greatly enlightened as to the diffiGulties they 

 may encounter, and the readiest and most scientific way of overcoming 

 them ; while this study will enable the skilled practitioner to describe his 

 interesting cases with more clearness and precision. To render what has 

 just been stated more convenient, the following table is given, in order 

 to show at a glance the different presentations and positions. 



Fig. 6i. 

 Cephalo-sacral Position of the Fcetus. 



Presentations and Positions of the Fcetus. 



Anterior Positions . . 



Posterior Positions . . 



Dorso-lumbar Positions . 

 Sterno-abdominal Positions 



13 



Vertebro-sacral. 

 Vertebro-pubic. 

 Right Vertebro-ilial. 

 Left Vertebro-ilial. 

 Lumbo-sacral. 



6. Lumbo-pubic. 



7. Right Lumbo-ilial. 



8. Left Lumbo-ilial. 



9. Right Cephalo-ilial. 



0. Left Cephalo-ilial. 



1. Cephalo-sacral. 



2. Right Cephalo-ilial. 

 Left Cephalo-ilial. 



SECTION III. mechanism OF PARTURITION. 



Under normal conditions, it may be said that the pelvis itself does not 

 offer any obstacle to the passage of the foetus, and that it is the soft parts 

 alone which oppose its exit. 



