PARTURITION. 



495 



and, when passing through the pelvic cavity, touching the ascending 

 branch of the left ilium. The feet, when they are not in the pelvis, must, 

 of course, be sought for on the opposite side, towards the right flank of 

 the mother. 



4. Fight Vertehro-ilial Position. — This is exactly the reverse of the last- 

 described position, the withers corresponding to the right ilium. 



The last two are sometimes named the lateral positions. They are less 

 frequent, as primary positions, than the first two. and are sometimes met 

 with as secondary positions after the reduction of a malpresentation — • 

 chiefly the doreal or ventral. 



Posterior Presentation, — In this the croup or breech first presents 

 at the pelvic inlet. The lumbar region of the foetus, which is the deter- 



ANTERIOR PRESENTATION ; FORE LIMB CROSSED OVER THE NECK. 



minate point, may be directed towards the sacrum, the pubis, or the right 

 or left branch of the ilium of the female. Hence we have four positions, 

 as in the preceding presentation. These are : 



1. Lumbosacral Position. — The foetus is in what some authorities have 

 called a "natural" position, but which is asserted by others to be un- 

 natural. The loins are towards the sacrum of the mother, the right coxo- 

 femoral articulation towards the right ilium, and the left articulation 

 towards the left ilium. This is sometimes named the first posterior 

 position. 



2. Lumho-puhic Position. — Some practitioners designate this the pos- 

 terior reversed position. The fcetus, in fact, is lying on its back, its croup 



