enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Fetal-maternal haemorrhage - Wikipedia

    en.wikipedia.org/wiki/Fetal-maternal_haemorrhage

    It is estimated that less than 1ml of fetal blood is lost to the maternal circulation during normal labour in around 96% of normal deliveries. [1] [2] The loss of this small amount of blood may however be a sensitising event and stimulate antibody production to the foetal red blood cells, an example of which is Rhesus disease of the newborn.

  3. Fetal circulation - Wikipedia

    en.wikipedia.org/wiki/Fetal_circulation

    The fetal circulation is composed of the placenta, umbilical blood vessels encapsulated by the umbilical cord, heart and systemic blood vessels. A major difference between the fetal circulation and postnatal circulation is that the lungs are not used during the fetal stage resulting in the presence of shunts to move oxygenated blood and ...

  4. Alkali denaturation test - Wikipedia

    en.wikipedia.org/wiki/Alkali_denaturation_test

    Fetal blood contains fetal hemoglobin composed of two alpha and two gamma subunits (aka hemoglobin F or HbF; i.e., normal fetal hemoglobin). This difference in composition gives the different types of hemoglobin different chemical properties (in addition to the higher affinity HbF has for dissolved blood oxygen over HbA, allowing baby to ...

  5. Percutaneous umbilical cord blood sampling - Wikipedia

    en.wikipedia.org/wiki/Percutaneous_umbilical...

    If the blood sample was obtained at the site close to the placenta, a fetal blood confirmation test should be done to ensure no mixing of fetal and maternal blood occurred before the diagnostic tests are done on the blood. Fetal red blood cells (RBC) are usually bigger than maternal RBCs, and the average volume of RBCs, the mean corpuscular ...

  6. Early pregnancy bleeding - Wikipedia

    en.wikipedia.org/wiki/Early_pregnancy_bleeding

    For those in whom the pregnancy is intrauterine and who have fetal heart sounds, watchful waiting is generally appropriate. [3] Anti-D immune globulin is usually recommended in those who are Rh-negative. [4] Occasionally, surgery is required. [1] About 30% of women have bleeding in the first trimester (0 to 14 weeks gestational age).

  7. Kleihauer–Betke test - Wikipedia

    en.wikipedia.org/wiki/Kleihauer–Betke_test

    the size of a fetal red blood cell is 1.22 times that of an adult red blood cell; the KB stain is known to have a mean success rate of 92% in detecting fetal red blood cells; in a woman at or near term in her pregnancy, the mean volume of maternal red blood cells is approximately 1800 ml;

  8. Cell-free fetal DNA - Wikipedia

    en.wikipedia.org/wiki/Cell-free_fetal_DNA

    Cell-free fetal DNA (cffDNA) is fetal DNA that circulates freely in the maternal blood. Maternal blood is sampled by venipuncture . Analysis of cffDNA is a method of non-invasive prenatal diagnosis frequently ordered for pregnant women of advanced maternal age .

  9. Umbilical artery - Wikipedia

    en.wikipedia.org/wiki/Umbilical_artery

    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] Resistance to blood flow decreases during development as the artery grows wider. [5]