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  2. Prenatal testing - Wikipedia

    en.wikipedia.org/wiki/Prenatal_testing

    PUBS is an invasive diagnostic test that can be done during the second trimester of pregnancy for individuals that are looking to identify or are at higher risk of passing chromosomal and/or blood abnormalities. The demand for cordocentesis tests is diminishing because it has been replaced with CVS and Amniocentesis, which carry less risk.

  3. 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 ...

  4. 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]

  5. 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.

  6. Chorionic villus sampling - Wikipedia

    en.wikipedia.org/wiki/Chorionic_villus_sampling

    Family history of a chromosomal abnormality or other genetic disorder; Parents are known carriers for a genetic disorder; Advanced maternal age (maternal age above 35). AMA is associated with increase risk of Down's syndrome and at age 35, risk is 1:400. [citation needed] Screening tests are usually carried out first before deciding if CVS ...

  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. Nuchal scan - Wikipedia

    en.wikipedia.org/wiki/Nuchal_scan

    As nuchal translucency size increases, the chances of a chromosomal abnormality and mortality increase; 65% of the largest translucencies (>6.5mm) are due to chromosomal abnormality, while fatality is 19% at this size. [2] A nuchal scan may also help confirm both the accuracy of the pregnancy dates and the fetal viability.

  9. Obstetric ultrasonography - Wikipedia

    en.wikipedia.org/wiki/Obstetric_ultrasonography

    Transvaginal scans usually provide clearer pictures during early pregnancy and in obese women. Also used is Doppler sonography which detects the heartbeat of the fetus. Doppler sonography can be used to evaluate the pulsations in the fetal heart and bloods vessels for signs of abnormalities.

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