The principles and practice of obstetrics . C!Z|00 SI^^S^ SACEO-PUBIG POSITION, 173 The head thus passes perpendicularly not onlythrough the inferior strait but through the variousplanes of the canal of the vagina, including that of theexternal orifice. Hence, when it passes this orifice,(Plate XIL, Fig. 65,) the nape of the neck will befound under the arch of the pubis, the anterior fonta-nel at the posterior commissure of the vulva, and theparietal protuberances on either side, so that the cer-vico-bregmatic circumference is now parallel to thatof the orifice of the vagina. It will also be f
The principles and practice of obstetrics . C!Z|00 SI^^S^ SACEO-PUBIG POSITION, 173 The head thus passes perpendicularly not onlythrough the inferior strait but through the variousplanes of the canal of the vagina, including that of theexternal orifice. Hence, when it passes this orifice,(Plate XIL, Fig. 65,) the nape of the neck will befound under the arch of the pubis, the anterior fonta-nel at the posterior commissure of the vulva, and theparietal protuberances on either side, so that the cer-vico-bregmatic circumference is now parallel to thatof the orifice of the vagina. It will also be found thatthe chin, closely approximated to the breast, correspondsto the centre of the orifice of the vagina, and the occi-pito-mental diameter to the axis of this opening. Thus, if the delivery be perfectly natural, if no trac-tion be made upon the body of the child, and if it be ex-pelled simply by the bearing-down efforts of the mother,it will be found that the child presents its chin at thesuperior strait, the orifice of the uterus, th
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Keywords: ., boo, bookcentury1800, booksubjectobstetrics, booksubjectpregnancy
