. The science and art of midwifery. a prominent feature in the latter months,when spontaneous painless contractions are ordinary incidents of thenormal condition. 3. The researches of Friedlander, Kundrat, Engelmann, and Leo-pold have demonstrated that the decidua vera of pregnancy is dis-tinguishable into an outer, dense, membranous stratum, composed oflarge cells resembling pavement epithelia, probably metamorphosedcylindrical cells, and an — in appearance — underlying mesh-work,formed from the walls of the enlarged decidual glands. It is inthis spongy layer that the separation of the decidu
. The science and art of midwifery. a prominent feature in the latter months,when spontaneous painless contractions are ordinary incidents of thenormal condition. 3. The researches of Friedlander, Kundrat, Engelmann, and Leo-pold have demonstrated that the decidua vera of pregnancy is dis-tinguishable into an outer, dense, membranous stratum, composed oflarge cells resembling pavement epithelia, probably metamorphosedcylindrical cells, and an — in appearance — underlying mesh-work,formed from the walls of the enlarged decidual glands. It is inthis spongy layer that the separation of the decidua takes place, thefundi of the glands persisting, even after the expulsion of the many, a fatty degeneration of the cells of the decidua has been * Vide Tarnier et Chantreuil, Traite de lart des accouchements, p. 203. 132 LABOR. observed toward the end of pregnancy, but Leopold, Dohrn, andLanghans have shown that this is not of constant occurrence.* Thetrabecule which inclose the spaces of the net-work diminish in size. Fig. 7G.—The mucous membrane of the uterus. A, amnion; 7?, reflexa ; D, decidua vera;Z>, R, glandular spaces of the lower stratum ; J/, muscular structure of uterus. (Engel-mann.) with the advance of pregnancy. Thus, while they measure at thefourth month about -^ of an inch in thickness, they become gradu-ally reduced in the subsequent months to ■$■£§■$ °f an inch, a changewhich materially facilitates the peeling off of the decidual surface, f 4. From the fifth month onward, large-sized cells make theirappearance in the serotina, especially in the neighborhood of thin-walled vessels. The largest of the so-called giant-cells contain some-times as many as forty nuclei. Though a physiological product, theyresemble for the most part the so-called specific cancer-cells of the olderwriters. They are of special obstetrical interest from the fact observedby Friedlander, and confirmed by Leopold, J that they penetrate theuterine sinuses from the
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Keywords: ., bookcentury1800, bookdecade1890, bookidsci, booksubjectobstetrics
