Practical midwifery; handbook of treatment . of the head upon the trunk, by whichthe forehead, face, and chin are successively swept over thefourchette and Ijrought into the world. This movement of ex-tension usually begins at the time that the large fontanelle ajo-pears at the edge of the perina-um. Delivery of the Body.—At the time Avhen the head emerges theshoulders are still in the pelvic canal, which they of course enter LABOR. 97 in tlio opposite oblique diainetev, and as the continuance of theuterine contractions drives theui onward, their rotation underthe same forces results in tlie m
Practical midwifery; handbook of treatment . of the head upon the trunk, by whichthe forehead, face, and chin are successively swept over thefourchette and Ijrought into the world. This movement of ex-tension usually begins at the time that the large fontanelle ajo-pears at the edge of the perina-um. Delivery of the Body.—At the time Avhen the head emerges theshoulders are still in the pelvic canal, which they of course enter LABOR. 97 in tlio opposite oblique diainetev, and as the continuance of theuterine contractions drives theui onward, their rotation underthe same forces results in tlie movement whicli is known as ex-ternal rotation or restitution, by winch the occiput is made toturn again to the side on which it orig-inally was. The shoulders then move forward under the influence of thepelvic planes until the perineal shoulder appears at the vulva;by continuance of the same motion the anterior shoulder is re-leased from the pubic arch (Fig. 11), and upon the disengagementof the shoulders the Avhole trunk follows Fi&. 11.—Expulsion of the Shoulders. Third Stage.—After the delivery of the child the uterine con-tractions commonly cease for a short time, but after the expira-tion of a few minutes they begin again, and under normal cir-cumstances but a few pains are required to expel the placentainto the vagina; the muscular contractions of the vaginal wallsurge it onward, it dilates the laerineum and sweeps forward inthe same curve of Cams (Fig. 10) that must be traversed byany object that is born from the vagina. The mechanism by which the placenta is freed from the uterushas been described in two ways, both of which probably some cases a decrease in the size of the uterine walls tears awaythe placenta and membranes from tneir attachments, and it isthen driven into the vagina, edge foremost, by direct pressureupon its substance from the uterine wall. In other cases it is:IDrobable that the blood poured forth from the utero-placental7 98 P
Size: 1502px × 1664px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectmidwifery, bookyear18
