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Updated: May 7, 2025
Again, the amniotic fluid prevents injuries that might otherwise befall the child in case the mother wears her clothing too tight. Harmful as the practice of tight-lacing during pregnancy is, it does not, thanks to the presence of the amniotic fluid, result in the disfigurement of the child.
The Germinal Cells Fertilization The First Steps in Development The Reaction of the Uterus The Amniotic Fluid The Placenta The Umbilical Cord. Pregnancy, besides changing the external form of the body, causes sensations as for example those due to fetal movements which are so distinctive that they cannot escape notice.
The swinging motions characterize the whole picture still better. The earthquake, however, contains, as is found in the analysis, death thoughts also. The rectangular space becomes a grave. Even the water of the dream deserves notice. “Babies come out of the water,” says an infantile theory of procreation. We learn later that the fœtus floats in amniotic liquor.
Likewise, rupture of the sack containing the fetus, with escape of the amniotic fluid, indicates that the culmination of events will not long be delayed. The most favorable outcome is when the entire contents of the womb are spontaneously expelled, which unfortunately does not always occur.
Subsequently, the sac which incloses the embryo becomes everywhere fastened to the inner surface of the uterus and completely fills the uterine cavity. THE AMNIOTIC FLUID. The great enlargement of the uterus which is so marked a characteristic of the latter part of pregnancy is due in a measure to the luxuriant blood-supply, for better nutrition always causes growth.
There is a case mentioned in which an accident and an inopportune dose of ergot at the fifth month of pregnancy were followed by rupture of the amniotic sac, and subsequently a constant flow of watery fluid continued for the remaining three months of pregnancy. The fetus died at the time, and was born in an advanced state of putrefaction, by version, three months after the accident.
The placenta has two surfaces, easily distinguished from each other. The raw maternal surface was formerly attached to the inside of the uterus; the fetal surface, covered by the amniotic membrane, was in contact with the amniotic fluid. Across the fetal surface run a number of blood-vessels containing the child's blood, converging toward a central point at which the umbilical cord is inserted.
This Earth was in one respect like a huge amniotic sac of impermanent quasi-reality in which he seemed to be a six billionth major cell of some inchoate but never complete organism that was being tossed therein.
Hochstetter describes a full-term, living male fetus with cutaneous defect on both sides of the abdomen a little above the umbilicus. The placenta and membranes were normal, a fact indicating that the defect was not due to amniotic adhesions; the child had a club-foot on the left side. The mother had a fall three weeks before labor. Abnormal Elasticity of the Skin.
Jerome A. Anderson sums up his highly interesting paper on the "Nutrition of the Foetus" in the American Journal of Obstetrics, Vol. XXI, July, 1888, as follows: "To briefly sum up the facts supporting amniotic nutrition: "1st. The constant presence of nutritive substances in the amniotic fluid during the whole period of gestation. "2nd.
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