amniotic sac


: amnion

Examples of amniotic sac in a Sentence

Recent Examples on the Web Amniotic band syndrome is a condition that occurs when fibrous bands in the amniotic sac become entangled around a developing fetus. Elizabeth Flores, USA TODAY, 3 Jan. 2024 Instead, the report found an increase in infants who died from pregnancy complications, such as the cervix’s opening too early or the amniotic sac’s rupturing before labor begins. Aria Bendix, NBC News, 1 Nov. 2023 The amniotic sac usually ruptures during labor or delivery. Nicole Harris, Parents, 6 July 2023 Contractions haven't started within 24 hours of your water breaking: If significant time passes after the amniotic sac ruptures before a baby is delivered, there is a greater chance of developing an infection that can harm the baby, says Dr. Gottesfeld. Nicole Harris, Parents, 6 July 2023 These sensors are inserted through the uterus and reside in the amniotic sac. IEEE Spectrum, 13 Dec. 2018 Currently, determining a fetus's genome requires either amniocentesis, in which a needle is inserted through the mother's abdomen into the amniotic sac, or chorionic villus sampling, in which a piece of placenta is removed. Jennifer Welsh, Discover Magazine, 9 Dec. 2010 Each twin has his or her own placenta and amniotic sac. Beth Reese Cravey, USA TODAY, 11 Mar. 2023 As monoamniotic twins, their girls, Lynlee and Lydia, are identical or semi-identical twins who shared the same amniotic sac within their mother’s uterus. Ben Flanagan |, al, 24 Feb. 2023 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'amniotic sac.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1831, in the meaning defined above

Time Traveler
The first known use of amniotic sac was in 1831

Dictionary Entries Near amniotic sac

Cite this Entry

“Amniotic sac.” Dictionary, Merriam-Webster, Accessed 3 Mar. 2024.

Medical Definition

amniotic sac

: amnion

More from Merriam-Webster on amniotic sac

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!