Veterinary obstetrics, including the diseases of breeding animals and of the new-born . ffer more or lessserious obstacles to delivery. The symptoms of double monstros-ities vary according to the particular abnormality and thepresentation. Commonly, where a fetus is double at one extremity only, itpresents by that extremity, and consequently the abnormal por-tion of the fetus is within reach and the can be made bymanual exploration. A double face, head, neck, or chest is Double and Triple Monstrosities 749 usually easy to differentiate by palpation. Double monstrositiesin which the
Veterinary obstetrics, including the diseases of breeding animals and of the new-born . ffer more or lessserious obstacles to delivery. The symptoms of double monstros-ities vary according to the particular abnormality and thepresentation. Commonly, where a fetus is double at one extremity only, itpresents by that extremity, and consequently the abnormal por-tion of the fetus is within reach and the can be made bymanual exploration. A double face, head, neck, or chest is Double and Triple Monstrosities 749 usually easy to differentiate by palpation. Double monstrositiesin which the double condition affects the posterior extremityonly, if presenting posteriorly, enable the operator to reach for-ward a sufficient distance to properly examine the point ofbifurcation and diagnose the double character of the fetus. In those cases where the single end of the fetus presents andenters the pelvic inlet, the dystokia is not apparent until thedouble portion reaches the pelvic inlet and its progress is stoppedbecause of the abnormal size. Then the obstetrist, in making an. Fig. 127. Tetrachirus Choristocephalus. (Gurlt). examination, should be able to pass his hand alongside the singleportion of the fetus until he reaches the double portion, thecharacter of which, especially the spinal bifurcation, should berecognized by the sense of touch. In the complete double monster, like the thoracopagus andothers of similar type, Figs. 126 and 127, the obstetrist finds thetwo corresponding portions of the body advancing simultaneously,and cannot repel or advance the one without moving the otherin a corresponding direction. Moreover, as a general rule hewill be able to reach that portion of the two bodies where theyare connected, and thus determine the character of the anomalywith which he has to deal. In the very rare pigodidymus aversus, Fig. 129, it would be ex- 750 Veterinary Obstetrics ceedingly difficult to diagnose the condition until the presentingportion of the monster
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