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  2. Umbilical cord - Wikipedia

    en.wikipedia.org/wiki/Umbilical_cord

    Umbilical cord compression can result from, for example, entanglement of the cord, [16] a knot in the cord, [16] or a nuchal cord, [16] (which is the wrapping of the umbilical cord around the fetal neck) [17] but these conditions do not always cause obstruction of fetal circulation.

  3. Twin reversed arterial perfusion - Wikipedia

    en.wikipedia.org/wiki/Twin_reversed_arterial...

    The acardiac twin is a parasitic twin that fails to properly develop a heart, and therefore generally does not develop the upper structures of the body. The parasitic twin, little more than a torso with or without legs, receives its blood supply from the host twin by means of an umbilical cord-like structure (which often only has two blood vessels, instead of three), much like a fetus in fetu ...

  4. Placental insufficiency - Wikipedia

    en.wikipedia.org/wiki/Placental_insufficiency

    Histopathology of placenta with increased syncytial knotting of chorionic villi, with two knots pointed out. The following characteristics of placentas have been said to be associated with placental insufficiency, however all of them occur in normal healthy placentas and full term healthy births, so none of them can be used to accurately diagnose placental insufficiency: [citation needed]

  5. Umbilical artery - Wikipedia

    en.wikipedia.org/wiki/Umbilical_artery

    The umbilical arteries are actually the anterior division of the internal iliac arteries, and retain part of this function after birth. [3] The umbilical arteries are one of two arteries in the human body, that carry deoxygenated blood, the other being the pulmonary arteries. The pressure inside the umbilical artery is approximately 50 mmHg. [4 ...

  6. Persistent fetal circulation - Wikipedia

    en.wikipedia.org/wiki/Persistent_fetal_circulation

    Persistent fetal circulation in neonates can be reversible or irreversible depending on the classified etiology listed above. If related to pulmonary disorders, the amount of lung damage dictates whether or not treatment is efficacious in reversing newborn lung insufficiency.

  7. Single umbilical artery - Wikipedia

    en.wikipedia.org/wiki/Single_umbilical_artery

    Occasionally, during pregnancy, there is a single umbilical artery (SUA) present in the umbilical cord, as opposed to the usual two. [1] This is sometimes also called a two-vessel umbilical cord, or two-vessel cord. Approximately, this affects between 1 in 100 and 1 in 500 pregnancies, making it the most common umbilical abnormality.

  8. Umbilical cord compression - Wikipedia

    en.wikipedia.org/wiki/Umbilical_cord_compression

    Nuchal cord, when the umbilical cord is (tightly) around the neck of the fetus [2] Entanglement of the cord [2] Knot in the cord [2] Cord prolapse, where the umbilical cord exits the birth canal before the baby, which can cause cord compression. [3] As a complication of oligohydramnios in which there is insufficient amniotic fluid

  9. Placental disease - Wikipedia

    en.wikipedia.org/wiki/Placental_disease

    There is no target treatment available for placental disease. Associative prevention mechanisms can be a method of minimising the risk of developing the disease, within early stages of pregnancy. Placental syndromes include pregnancy loss, fetal growth restriction, preeclampsia, preterm delivery, premature rupture of membranes, placental ...