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  2. Prenatal testing - Wikipedia

    en.wikipedia.org/wiki/Prenatal_testing

    CVS is an invasive diagnostic test that can be done during the first trimester of pregnancy for individuals that are looking to identify or are at higher risk of passing chromosomal abnormalities. A tissue cell sample of the placenta is obtained abdominally via needle or via vaginal insertion of a catheter/syringe into the cervix in combination ...

  3. Noninvasive prenatal testing - Wikipedia

    en.wikipedia.org/wiki/Noninvasive_prenatal_testing

    Noninvasive prenatal testing (NIPT) is a method used to determine the risk for the fetus being born with certain chromosomal abnormalities, such as trisomy 21, trisomy 18 and trisomy 13. [ 1 ] [ 2 ] [ 3 ] This testing analyzes small DNA fragments that circulate in the blood of a pregnant woman. [ 4 ]

  4. Anomaly scan - Wikipedia

    en.wikipedia.org/wiki/Anomaly_scan

    Anatomy scan of the fetal head at 20 weeks of pregnancy in a fetus affected by spina bifida. In the axial scan the characteristic lemon sign and banana sign are seen. Anatomy scan with power bi-directional colour Doppler of both fetal kidneys at 18 weeks of pregnancy to detect renal agenesis. The videoclip shows a frontal scan with normal renal ...

  5. List of fetal abnormalities - Wikipedia

    en.wikipedia.org/wiki/List_of_fetal_abnormalities

    Fetal abnormalities are conditions that affect a fetus or embryo, are able to be diagnosed prenatally, and may be fatal or cause disease after birth. They may include aneuploidies, structural abnormalities, or neoplasms. Acardiac twin; Achondrogenesis; Achondroplasia; Adrenal hematoma; Agenesis of the corpus callosum; Amniotic band syndrome ...

  6. Cell-free fetal DNA - Wikipedia

    en.wikipedia.org/wiki/Cell-free_fetal_DNA

    An example of an algorithm for determining the indication for prenatal genetic testing for trisomy 21 (Down syndrome), wherein the genetic blood test (in center) is performed by detecting cffDNA in a blood sample from the mother. [60] Trisomy 21. Fetal trisomy of chromosome 21 is the cause of Down's syndrome.

  7. Triple test - Wikipedia

    en.wikipedia.org/wiki/Triple_test

    The triple test, also called triple screen, the Kettering test or the Bart's test, is an investigation performed during pregnancy in the second trimester to classify a patient as either high-risk or low-risk for chromosomal abnormalities (and neural tube defects). The term "multiple-marker screening test" is sometimes used instead.

  8. Amniocentesis - Wikipedia

    en.wikipedia.org/wiki/Amniocentesis

    Prenatal diagnostic testing, which includes amniocentesis, is necessary to conclusively diagnose the majority of genetic disorders, with amniocentesis being the gold-standard procedure after 15 weeks' gestation. [3] In this procedure, a thin needle is inserted into the abdomen of the pregnant woman. [4]

  9. Percutaneous umbilical cord blood sampling - Wikipedia

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

    Percutaneous umbilical cord blood sampling (PUBS), also called cordocentesis, fetal blood sampling, or umbilical vein sampling is a diagnostic genetic test that examines blood from the fetal umbilical cord to detect fetal abnormalities. [1] Fetal and maternal blood supply are typically connected in utero with one vein and two arteries to the fetus.

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