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fetal hemoglobin
noun
: a hemoglobin variant that predominates in the blood of a newborn and persists in increased proportions in some forms of anemia (such as thalassemia)
Examples of fetal hemoglobin in a Sentence
Recent Examples on the Web
That approach required taking bone marrow cells out of the body, making a disabling cut in a particular gene that regulates fetal hemoglobin, treating the patient with chemotherapy to make room in the marrow, and then reinfusing the edited cells.
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Francis Collins, WIRED, 7 Jan. 2025
The form of hemoglobin that babies make at birth, called fetal hemoglobin (HbF), isn’t affected by the sickle mutation.
—
Sara Reardon, Scientific American, 17 Sep. 2024
Before birth a fetus with the disease has healthy red blood cells because fetal hemoglobin (HbF) is dominant at that point and is unaffected by the sickle cell mutation.
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Ambroise Wonkam, Scientific American, 17 Sep. 2024
Since the 1990s, clinicians have observed that sickle cell patients with higher levels of fetal hemoglobin tend to live longer.
—
Charlotte Hu, Vox, 6 May 2024
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Word History
First Known Use
1950, in the meaning defined above
Dictionary Entries Near fetal hemoglobin
Cite this Entry
“Fetal hemoglobin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fetal%20hemoglobin. Accessed 11 Feb. 2025.
Medical Definition
fetal hemoglobin
noun
: hemoglobin that consists of two alpha chains and two gamma chains and that predominates in the blood of a newborn and persists in increased proportions in some forms of anemia (as thalassemia)
called also hemoglobin F
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