A nurse's handbook of obstetrics, for use in training-schools . Fig. 49.—Breech presentation. (Bumm.) A left saero-anterior; B right sacroposterior. Fig. 50.—Prolapse of arm in transverse presentation. (Tarnier and Chantreuil.) 138 A NURSES HANDBOOK OF OBSTETRICS. Other presentations, all of which are very rare, are those ofthe foot, arm (Fig. 50), or shoulder. The study of the special mechanism of the different presenta-tions and positions is one of great interest, but the brief outlinegiven of the mechanism in anterior positions of the occiput isall that directly concerns the nurse. All othe
A nurse's handbook of obstetrics, for use in training-schools . Fig. 49.—Breech presentation. (Bumm.) A left saero-anterior; B right sacroposterior. Fig. 50.—Prolapse of arm in transverse presentation. (Tarnier and Chantreuil.) 138 A NURSES HANDBOOK OF OBSTETRICS. Other presentations, all of which are very rare, are those ofthe foot, arm (Fig. 50), or shoulder. The study of the special mechanism of the different presenta-tions and positions is one of great interest, but the brief outlinegiven of the mechanism in anterior positions of the occiput isall that directly concerns the nurse. All other cases are more or less abnormal, and, as theirprogress is usually slow, their management must be left entirelyin the hands of the medical attendant. XIII The Phenomena of Labor Labor occurs at the end of pregnancy, and is also known bythe various names of delivery confinement lying-inand parturition. The usual time for labor to take place is two hundred andeighty days (ten lunar months, or nine calendar months) afterthe occurrence of conception. This period varies somewhat, andit is possible for a child to be born and live after only abou
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