fetal hemoglobin

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Related to Fetal blood: fetal hemoglobin

he·mo·glo·bin F

[MIM*142200]
normal fetal Hb (Hb F) of molecular formula α2Aγ2F, which is the major Hb component during intrauterine life, decreasing rapidly during infancy to reach a concentration of less than 0.5% in normal children and adults; the concentration of Hb F is increased in some hemoglobinopathies and in some cases of hypoplastic anemia, pernicious anemia, and leukemia; Hb F has a weaker affinity for 2,3-bisphosphoglycerate than does Hb A. More than 50 mutant variants of the γ chain have been reported.
Synonym(s): fetal hemoglobin

fetal hemoglobin

n.
The predominant form of hemoglobin in fetuses and newborn infants, present in small amounts in adults but often elevated in adults with certain forms of anemia and other disorders.

fetal hemoglobin

Hemoglobin F An immature Hb composed of 2 α and 2 γ chains that usually disappears in the neonatal period. See Hereditary persistence of fetal hemoglobin.
References in periodicals archive ?
Edema will decrease the blood flow in the villous blood vessels and lead to ischemia of the villi and interfere with the transfer of oxygen and nutrients from the maternal blood to the fetal blood. It also enhances more production of VEGF in the placental tissues (Duh & Aiello; Cohen et al.).
It is concluded that Cardiotocography can be used as good screening tool for fetal surveillance especially where fetal blood sampling or fetal ECG are not available.
When fetal blood reaches the placenta, this process is reversed and C[O.sub.2] diffuses across the placenta to the maternal circulation.
In our study it was a pure isolate from fetal blood in two cases of AFIS.
(%) Normoblastemia of fetal blood 63 (19.2) Villous infarction (>5% of placental parenchyma) 38 (11.6) Hypertrophic decidual arteriolopathy 57 (17.4) Atherosis of spiral arterioles 15 (4.6) Laminar necrosis of membranes (c) 38 (11.6) Chorionic disc microscopic chorionic pseudocysts (d) 21 (6.4) Maternal floor multinucleate trophoblastic giant cells 31 (9.4) Excessive amount of extravillous trophoblasts in chorionic disc 16 (4.9) Choriodecidual hemosiderosis 13 (4.0) Lesions related to decreased/ absent fetal blood flow, No.
The effects of regional anaesthesia for caesarean section on maternal and fetal blood flow velocities measured by Doppler ultrasound.
Fetal DNA is found in mother's blood stream, cell-free fetal DNA enters into the blood stream through the placenta, placenta is a flattened organ in the uterus where maternal blood and fetal blood. The fetal DNA can be split into very acute fragments, less than 200 base pairs on an average.
Its elevated maternal levels have previously been associated with clinical metrics of fetal blood supply [18].
Maternal blood was obtained before C-section and fetal blood was collected from the umbilical cord vein after birth.
We postulate that the MCA PSV was not raised because of the combination of hypoxia due to placental insufficiency and possibly episodes of hypovolaemia, superimposed on the effects of (sub)acute anaemia due to fetal blood loss.
The editors have organized the contributions that make up the main body of the text in thirteen chapters devoted to fetal heart activity and measurements of labor activities, fetal blood analysis, amniotic fluid interventions and examinations, and a wide variety of other related subjects.