posiTioxs OF mi-: fu-jtus. 



24 r. 



are sometimes met with as secondary positions after the reduction of 

 a inal-presentatiou — cliielly the dorsal or ventral. 



lu addition to these anterior positions, Saint-Cyr gives other four 

 intermediate ones whicli may be observed wlien the sterno-dorsal 

 diameter of the fa'tus corresponds to the oblique diameters of th(! 

 pelvis (Fig. 74, c i, f h). These are as follows : 



o. Bight Dorso-ilio-sacral Position. — This is the intermediate posi- 

 tion between the dorso-sacral and right dorso-ilial, the withers being 

 in relation with the right ilio-sacral articulation. 



G. Left Dorso-supra'Cotyloid Position. — This, again, is intermediate 

 between the dorso-pubic and left dorso-ilial position, and quite the 

 reverse of the preceding ; the withers are inclined downwards and to 



Fig. 75. 



LfMBO-SACRAL Po.smON. 



the left, above the cotyloid cavity, while the sternum lies towards the 

 sacro-iliac articulation. 



7. Lc/t Dorso-ilio-sacral Position. — Here the position is intermediate 

 between the dorso-sacral and left dorso-ilial. 



8. Iii(iht Dorso-supra-cotyloid Position. — This is the reverse of the 

 preceding. 



The dorso-sacral and the two dorso-ilio-sacral positions are quite 

 natural, as during parturition the curving of the body of the foetus 

 corresponds to that of the mother's body, while the superior diameters 

 of the tirst — the ccrvico-biscupulo-hnmeral and hicoxo-frmoral — which 

 are the greatest, are related to the superior bis-iliac diameter of the 

 pelvis. The two dorso snpra-cotyloid positions are, on the contrary, 

 reversed and abnormal, like the dorso-piibic, because the curved con- 

 dition of the body of the foetus is the reverse of that of the body of 

 the parent, as well as opposed to the direction of the axis of the pelvis ; 



