File:The practice of obstetrics, designed for the use of students and practitioners of medicine (1910) (14753459206).jpg

Identifier: practiceofobstet00edga (find matches)
Title: The practice of obstetrics, designed for the use of students and practitioners of medicine
Year: 1910 (1910s)
Authors: Edgar, J. Clifton (James Clifton), 1859-1939
Subjects: Obstetrics
Publisher: 3rd ed., rev
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons

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Irdernal os Erigrmil OS. Fig 136.—Frozen Section of a Uterus at the Seventh Month, with RetainedPlacenta and Membranes.—(Freund.) 99 100 PHYSIOLOGICAL PREGNANCY. For the size of the uterus at the end of each calendar month see table, pages86 and 87. 2. Shape.—The virgin uterus is pyriform or pear-shaped, flattened frombefore backward (Fig. 120). Its upper end or fundus, the broad extremity ofthe organ, is directed upward and forward (Fig. 119). Its lower end, or apex,looks downward and backward. Consequently it forms an angle with thevagina. During the first six or eight weeks of gestation the organ loses its «^^^
Text Appearing After Image:
Fig. 137.—Pregnant Uterus at Thirty-eighth Week seen from the Front. Ante-rior walls are held back to show the maternal surface of the placenta, the tinrupturedamnion, thickness of the uterine walls, and the length of the cervical canal.—(Authorscase.) flattened pear shape and bulges out over the cervix, in all the transverse diam-eters, but more particularly antero-posteriorly; so that now the uterus resemblesvery much an old-fashioned jug inverted (Fig. 169). Later it expands morein the lower segment, and by the fifth month its form is midway between sphericaland pyriform, the vertical diameter being longest (Fig. 132). Its antero-posterior measurement is greatest just below the middle of the body. Duringthe last of pregnancy it becomes egg-shaped, ovoid, or cylindrical (Fig. 137).These changes in shape occur in the normal uterus, but may be influenced by SHAPE OF THE UTERUS. 101 multiple pregnancies, by anomalies of the liquor amnii, and by pathologicalconditions. Asymmetry of

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