amniocentesis

noun

am·​nio·​cen·​te·​sis ˌam-nē-ō-(ˌ)sen-ˈtē-səs How to pronounce amniocentesis (audio)
plural amniocenteses ˌam-nē-ō-(ˌ)sen-ˈtē-ˌsēz How to pronounce amniocentesis (audio)
: the surgical insertion of a hollow needle through the abdominal wall and into the uterus to obtain amniotic fluid especially for the determination of fetal sex or chromosomal abnormality

Example Sentences

Recent Examples on the Web Many centers rely on amniocentesis, which is not offered before the 15th week of pregnancy because the risks of complications are too high. Roni Caryn Rabin, New York Times, 7 Oct. 2022 The next round of tests, including an amniocentesis and echocardiogram, confirmed the severity of their baby's case of HLHS and an additional complication of aortic atresia. Stephanie Emma Pfeffer, Peoplemag, 11 Nov. 2022 A week after the initial test results, an amniocentesis and an ultrasound to see Juliet’s anatomy confirmed the worst: Juliet had a severe heart condition, muscular problems, and other complications. al, 29 June 2022 By 23 weeks, Miller still didn’t have the final results of her amniocentesis, but Pennsylvania law bans abortions after 24 weeks. Aria Bendix, NBC News, 11 May 2022 A week after the initial test results, an amniocentesis and an ultrasound to see Juliet's anatomy confirmed the worst: Juliet had a severe heart condition, muscular problems, and other complications. Sara Reardon, CBS News, 27 June 2022 That's because ultrasounds don’t usually give a clear picture of abnormalities until around 18 to 20 weeks, and patients must wait until nearly halfway into pregnancy to get tests like an amniocentesis to diagnose genetic disorders. Aria Bendix, NBC News, 11 May 2022 To be clear, only invasive tests like amniocentesis that analyze DNA taken directly from fetal cells can confirm a prenatal genetic diagnosis. Daniel Navon, Scientific American, 5 May 2022 Greves said 90% of his patients who come to him because of a fetal abnormality are more than 15 weeks pregnant, mostly because amniocentesis, ultrasounds and blood tests that reveal that type of information are done later in gestation. Caroline Catherman, sun-sentinel.com, 27 Feb. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'amniocentesis.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

Etymology

New Latin, from amnion + centesis puncture, from Greek kentesis, from kentein to prick — more at center

First Known Use

1957, in the meaning defined above

Time Traveler
The first known use of amniocentesis was in 1957

Dictionary Entries Near amniocentesis

Cite this Entry

“Amniocentesis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/amniocentesis. Accessed 3 Dec. 2022.

Kids Definition

amniocentesis

noun

am·​nio·​cen·​te·​sis ˌam-nē-ō-(ˌ)sen-ˈtē-səs How to pronounce amniocentesis (audio)
plural amniocenteses -ˈtē-ˌsēz How to pronounce amniocentesis (audio)
: the procedure of inserting a hollow needle through the wall of the abdomen and into the uterus of a pregnant female to withdraw a sample of the fluid surrounding the fetus that is used to find out its sex and especially to check for abnormal chromosomes which may predict a birth defect

Medical Definition

amniocentesis

noun

am·​nio·​cen·​te·​sis ˌam-nē-ō-(ˌ)sen-ˈtē-səs How to pronounce amniocentesis (audio)
plural amniocenteses -ˌsēz How to pronounce amniocentesis (audio)
: the surgical insertion of a hollow needle through the abdominal wall and into the uterus of a pregnant female to obtain amniotic fluid especially to examine the fetal chromosomes for an abnormality and for the determination of sex

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