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The following have been identified as risk factors for placenta previa: Previous placenta previa (recurrence rate 4–8%), [13] caesarean delivery, [14] myomectomy [10] or endometrium damage caused by D&C. [13] Women who are younger than 20 are at higher risk and women older than 35 are at increasing risk as they get older.
655 Known or suspected fetal abnormality affecting management of mother. 655.73 Fetal movements, decreased, antepartum; 656 Other fetal and placental problems affecting management of mother. 656.0 Fetal-maternal hemorrhage affecting management of mother 656.11 Rh incompatibility, delivered; 656.31 Fetal distress, delivered; 656.53 Small-for ...
Placenta previa is a condition that occurs when the placenta fully or partially covers the cervix. [13] Placenta previa can be further categorized into complete previa, partial previa, marginal previa, and low-lying placenta, depending on the degree to which the placenta covers the internal cervical os.
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]
Complications such as placenta previa, placental abruption, placenta accreta, retained placenta, placental insufficiency, placental infarcts, anemia, and preeclampsia can limit the supply of oxygen and nutrients to the fetus, increasing the risk of birth defects. Severe cases may be fatal to the fetus. [10]
760 Fetus or newborn affected by material conditions which may be unrelated to present pregnancy. 760.7 Noxious influences affecting fetus or newborn via placenta or breast milk. 760.71 Fetal alcohol syndrome; 760.72 Exposure to narcotics, perinatal; 760.75 Exposure to cocaine, perinatal; 761 Fetus or newborn affected by maternal complications ...
The accumulating blood pushes between the layers of the decidua, pushing the uterine wall and placenta apart. When the placenta is separated, it is unable to exchange waste, nutrients, and oxygen, a necessary function for the fetus's survival. The fetus dies when it no longer receives enough oxygen and nutrients to survive. [9]
Besides placenta previa and placental abruption, uterine rupture can occur, which is a very serious condition leading to internal or external bleeding. Bleeding from the fetus is rare, but may occur with two conditions called vasa previa and velamentous umbilical cord insertion where the fetal blood vessels lie near the placental insertion site unprotected by Wharton's jelly of the cord. [11]