Amniocentesis

Part of speech: noun

Pronunciation: /ˌam.nɪ.ə(ʊ).sɛnˈtiːs.ɪs/

Definitions

1. A clinical procedure that uses a needle to draw amniotic fluid from the uterine cavity to analyze fetal cells for potential genetic anomalies, allowing for early detection of hereditary conditions This method combines invasive fluid extraction and genetic testing to aid prenatal healthcare for expectant mothers and their unborn children
2. A medical test involving the removal of fluid from around a developing fetus to examine genetic traits and detect abnormalities
3. A technique where a thin needle removes liquid surrounding the fetus for lab analysis to identify chromosomal or genetic disorders

Etymology: Amniocentesis is a modern medical coinage built from two Greek elements. The first, "amnion," is the thin membrane that surrounds the fetus in the womb, from the Greek word for a bowl or basin, which is why the membrane was named after a vessel. The second, "-centesis," comes from the Greek "kentesis," meaning a puncturing, from "kentein," to prick or pierce. Put together, the word describes puncturing the amniotic sac to draw off fluid. The compound was assembled from classical parts to name a procedure, so the ancient Greeks themselves never used it. The "-centesis" ending is shared with other medical terms for drawing fluid by puncture, such as "paracentesis," which means tapping the abdomen, and "thoracocentesis," which means puncturing the chest. Because the procedure samples fluid that contains fetal cells, the word names a test as much as an operation. The fluid is examined for genetic and developmental information about the unborn child.