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  2. Vasa praevia - Wikipedia

    en.wikipedia.org/wiki/Vasa_praevia

    This leaves unprotected vessels running over the cervix and in the lower uterine segment. This has been demonstrated using serial ultrasound. Oyelese et al. found that 2/3 of patient with vasa previa at delivery had a low-lying placenta or placenta previa that resolved prior to the time of delivery. There are three types of vasa previa.

  3. Placenta praevia - Wikipedia

    en.wikipedia.org/wiki/Placenta_praevia

    In those less than 36 weeks pregnant, corticosteroids may be given to speed development of the baby's lungs. [1] Cases that occur in early pregnancy may resolve on their own. [1] Placenta praevia affects approximately 0.5% of pregnancies. [5] After four cesarean sections, however, it affects 10% of pregnancies. [4]

  4. Placenta accreta spectrum - Wikipedia

    en.wikipedia.org/wiki/Placenta_accreta_spectrum

    An important risk factor for placenta accreta is placenta previa in the presence of a uterine scar. Placenta previa is an independent risk factor for placenta accreta. Additional reported risk factors for placenta accreta include maternal age and multiparity, other prior uterine surgery, prior uterine curettage, uterine irradiation, endometrial ablation, Asherman syndrome, uterine leiomyomata ...

  5. 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]

  6. Amniotic fluid index - Wikipedia

    en.wikipedia.org/wiki/Amniotic_fluid_index

    Premature rupture of membranes can also result in low amniotic fluid levels. Placental problems: Placental problems may cause low amniotic fluid. If the placenta is not providing enough blood and nutrients to the baby, then the baby may stop recycling fluid.

  7. Confined placental mosaicism - Wikipedia

    en.wikipedia.org/wiki/Confined_placental_mosaicism

    In theory, CPM is when the trisomic cells are found only in the placenta. CPM is detected in approximately 1-2% of ongoing pregnancies that are studied by chorionic villus sampling (CVS) at 10 to 12 weeks of pregnancy. Chorionic villus sampling is a prenatal procedure which involves a placental biopsy.

  8. Complications of pregnancy - Wikipedia

    en.wikipedia.org/wiki/Complications_of_pregnancy

    Alcohol: Use during pregnancy can cause fetal alcohol syndrome and fetal alcohol spectrum disorder. [67] Tobacco use: During pregnancy, causes twice the risk of premature rupture of membranes, placental abruption and placenta previa. [68] Also, it increases the odds of the baby being born prematurely by 30%. [69]

  9. Velamentous cord insertion - Wikipedia

    en.wikipedia.org/wiki/Velamentous_cord_insertion

    Normally in the second half of pregnancy, one-third of fetal cardiac output is directed towards the placenta. This fraction is reduced to around one-fifth in the last few weeks of pregnancy, while the remaining umbilical blood is recirculated in the fetal body, corresponding with decreased fetal reserves of oxygen. [25]

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