Obstetrics : the science and the art . enerally is found tobore with its head, so as to turn the vertex now forwards, and nowbackwards, until at last it becomes fixed in one position, by gettingunder the arch of the pubis. So common is it to observe the child todescend with the vertex opposite to the left acetabulum, that that istaken or counted as the first position of a vertex presentation; andBaudelocque, whose authority on this subject is much followed in theUnited States, enumerates a second, third, fourth, fifth, and sixth posi-tion, the enumeration or order being founded on the supposed
Obstetrics : the science and the art . enerally is found tobore with its head, so as to turn the vertex now forwards, and nowbackwards, until at last it becomes fixed in one position, by gettingunder the arch of the pubis. So common is it to observe the child todescend with the vertex opposite to the left acetabulum, that that istaken or counted as the first position of a vertex presentation; andBaudelocque, whose authority on this subject is much followed in theUnited States, enumerates a second, third, fourth, fifth, and sixth posi-tion, the enumeration or order being founded on the supposed rela-tive frequency of the several sorts, as they are met with in practice. Thus the most frequent, according to Baudelocque, is the first posi-tion, in which the vertex is directed to the left acetabulum, and theforehead to the right sacro-iliac symphysis. Here the two cardinalpoints come together. Next in order is the second position, in which the vertex is to theright acetabulum, and the forehead to the left sacro-iliac 312 LABOR. The third position is that in which the vertex is behind the pubisand the forehead in front of the promontory. The fourth position is that in which we find the vertex at the rightsacro-iliac symphysis and the forehead towards the left acetabulum. The fifth position is that in which the vertex is at the left sacro-iliacsymphysis, and the forehead towards the right acetabulum. And lastly, the sixth position, wherein the vertex is at the promon-tory and the forehead at the symphysis pubis. It is doubtless extremely convenient and proper to reduce all thepossible modes of vertex presentations to a small, yet sufficiently com-prehensive classification; but the reader, and especially the youngStudent, should remember that all these classifications are human in-ventions. They are the proposita or the dogmata of different men ;and. in fact, it is possible for any presentable part of the head topresent itself at any part of the brim. If he shou
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Keywords: ., boo, bookcentury1800, booksubjectmidwifery, booksubjectobstetrics
