The matron's manual of midwifery, and the diseases of women during pregnancy and in childbed .. . pecial notice. DELIVERY IN THE RIGHT POSTERIOR MENTO ILIACPOSITION OF THE FACE. The head descends with the forehead and chinnearly on a level, and the nose occupying the middle 200 THE MECHANIS3I OF DELIVERY. of the passage. When fairly in the cavity it rotates,the chin being brought under the pubes, while theback of the head passes into the curve of the is nearly always the process ; no matter wherethe chin may be when the labor commences, it sel-dom fails to move under the pubes befo
The matron's manual of midwifery, and the diseases of women during pregnancy and in childbed .. . pecial notice. DELIVERY IN THE RIGHT POSTERIOR MENTO ILIACPOSITION OF THE FACE. The head descends with the forehead and chinnearly on a level, and the nose occupying the middle 200 THE MECHANIS3I OF DELIVERY. of the passage. When fairly in the cavity it rotates,the chin being brought under the pubes, while theback of the head passes into the curve of the is nearly always the process ; no matter wherethe chin may be when the labor commences, it sel-dom fails to move under the pubes before it con-cludes. Occasionally it may rotate the other way,and pass into the hollow of the sacrum, while theocciput comes in front, but this is very rare. The chin is born first, and then follows, below, theforehead, top of the head, and finally the occiput—the face turning upwards towards the mothers ab-domen, as each part is successively delivered. Whentlie head is fully born, the body rotates inside thesmne as in the head presentation, and the deliveryconcludes in precisely the same FijT. 1.—The chin jnst passed, in presentation of the 2.—The head full born in presentation of the The Pubic bone.—c. The Coccygis. DELIVERY IN OTHER POSITIONS OF THE FACE. The delivery is precisely the same in all the otherpositions of the face, excepting that in some of them THE MECLANISM OF DELIVERY. 201 the chin has further to rotate before it can pass underthe pubes. In all cases however, it may be safelycalculated that it will do so, there having been sofew instances known in which it has rotated the otherway, into the hollow of the sacrum, which is fortu-nate, for there is always more or less difficulty anddanger when it does so. Sometimes the rotation does not take place at all,but the face descends diagonally, as the head occa-sionally does. On the whole presentations of the face are not par-ticularly to be feared, as regards the mother. Someauthors even
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Keywords: ., bookcentury1800, bookdecade1840, bookidmat, booksubjectobstetrics
