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Answer for the clue "Extraction by centesis of amniotic fluid from a pregnant woman (after the 15th week of pregnancy) to aid in the diagnosis of fetal abnormalities ", 13 letters:
amniocentesis

Word definitions for amniocentesis in dictionaries

Wikipedia Word definitions in Wikipedia
Amniocentesis (also referred to as amniotic fluid test or AFT ) is a medical procedure used in prenatal diagnosis of chromosomal abnormalities and fetal infections, and also used for sex determination in which a small amount of amniotic fluid , which contains ...

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ Although Belinda was 37, she decided against amniocentesis or any other test to detect chromosomal abnormalities. ▪ Coelocentesis: a new technique for early prenatal diagnosis Chorionic villus sampling and amniocentesis have ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1958, Modern Latin, from amnion (see amniotic )\n+ centesis "surgical puncture," from Greek kentesis "a pricking," from kentein "to prick," related to kontos "pole" (see center (n.)).

Wiktionary Word definitions in Wiktionary
n. (context medicine English) A procedure for obtaining amniotic fluid from a pregnant animal, by inserting a hollow needle through the abdominal wall and into the amniotic sac. Used in diagnosing possible genetic defects and/or obstetric complications.

WordNet Word definitions in WordNet
n. (pregnancy) extraction by centesis of amniotic fluid from a pregnant woman (after the 15th week of pregnancy) to aid in the diagnosis of fetal abnormalities [syn: amnio ] [also: amniocenteses (pl)]

Usage examples of amniocentesis.

She felt that amniocentesis was in order, but advised them that not only would that.

Fourteen weeks later, ultrasound revealed a fetal skeleton, normal in all ways for that stage of development, a week later, amniocentesis confirmed the fetus was male.

She had a chorion biopsy, and a fetoscopy, and an alpha-fetoprotein test, and amniocentesis.

They sat through previews of future programs-a science show on amniocentesis and a nature program that showed grown-up vultures feeding something red and raw to baby vultures.

Some of my equipment is basic, you know, and amniocentesis and other more esoteric requirements in a maternity unit were not deemed required.

For most of us, it was a world without air bags or mandatory seat belts, before the decrease in smoking, before early detection of cancer, before CAT scan, ultrasound, organ transplant, amniocentesis, and coronary bypass surgery, before 911 systems showed police and paramedics your address.