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a surgical procedure for obtaining a sample of amniotic fluid from the amniotic sac in the uterus of a pregnant woman by inserting a hollow needle through the abdominal wall, used in diagnosing certain genetic defects or possible obstetric complications.
Contemporary Examples

So when Sarah was 16 weeks pregnant, she got an amniocentesis.
Parents Sue for ‘Wrongful Birth’ Elizabeth Picciuto August 16, 2014

noun (pl) -ses (-siːz)
removal of some amniotic fluid by the insertion into the womb of a hollow needle, for therapeutic or diagnostic purposes

1958, Modern Latin, from amnion (see amniotic) + centesis “surgical puncture,” from Greek kentesis “a pricking,” from kentein “to prick,” related to kontos “pole” (see center (n.)).

amniocentesis am·ni·o·cen·te·sis (ām’nē-ō-sěn-tē’sĭs)
n. pl. am·ni·o·cen·te·ses (-sēz’)
A procedure in which a small sample of amniotic fluid is drawn out of the uterus through a needle inserted in the abdomen and is then analyzed to detect genetic abnormalities in the fetus or to determine the sex of the fetus.
A procedure usually done about the sixteenth week of pregnancy in which a small sample of amniotic fluid is drawn out of the uterus through a needle inserted in the abdomen. The fluid is analyzed to determine the gender of the fetus or the presence of genetic abnormalities.
amniocentesis [(am-nee-oh-sen-tee-sis)]

A procedure for finding certain disorders in a fetus during pregnancy. In amniocentesis, a small amount of the salty liquid that surrounds the fetus in the amniotic sac is drawn out through a needle inserted into the mother’s abdomen. The fluid generally contains some isolated cells from the fetus. These cells are analyzed to detect abnormalities in the chromosomes of the fetus, such as Down’s syndrome, and may also be used to judge some other conditions, such as the maturity of the fetus’s lungs.


Read Also:

  • Amniochorial

    amniochorial amniochorial am·ni·o·cho·ri·al (ām’nē-ō-kôr’ē-əl) or am·ni·o·cho·ri·on·ic (-kôr’ē-ŏn’ĭk) adj. Of, relating to, or characteristic of the amnion and the chorion.

  • Amniogenesis

    amniogenesis amniogenesis am·ni·o·gen·e·sis (ām’nē-ō-jěn’ĭ-sĭs) n. Formation of the amnion.

  • Amniography

    an x-ray examination of the amniotic sac after the injection of an opaque solution, performed to permit visualization of the umbilical cord and the placenta. amniography am·ni·og·ra·phy (ām’nē-ŏg’rə-fē) n. Radiographic examination of the amnion following its injection with a radiopaque substance.

  • Amnioma

    amnioma amnioma am·ni·o·ma (ām’nē-ō’mə) n. A broad flat skin tumor caused by amnionic adhesion before birth.

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