blastocyst
noun
blas·to·cyst
| \ ˈbla-stə-ˌsist
\
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Definition of blastocyst
: the modified blastula of a placental mammal having an outer layer composed of the trophoblast
Examples of blastocyst in a Sentence
Recent Examples on the Web
Ultimately, four of these early embryos developed into blastocysts, or embryos that are beginning to differentiate. — Rebecca Boyle, Discover Magazine, "The Quixotic Quest to Birth a Baby Northern White Rhino," 25 June 2019 Leaving embryos undisturbed from day one to day five —when the embryo becomes what’s known as a blastocyst—rather than checking on them on day three, as many centers do, has been similarly revolutionary. — Jancee Dunn, Vogue, "How California Became the World’s Fertility Treatment Destination," 13 Mar. 2019 For now, these early embryos, called blastocysts, have been frozen. — NBC News, "Scientists use test-tube science to save nearly extinct rhino," 4 July 2018 In mammals, a hollow sphere made out of fewer than 100 cells (called a blastocyst) forms days after an egg is fertilized. — Laura Yan, Popular Mechanics, "This Artificial Embryo Actually Started Pregnancy In Mice," 5 May 2018 Water in the blastocysts cells is replaced with a cryoprotectant, which functions like antifreeze. — Ginger Christ And Julie Washington, cleveland.com, "Tours of Ohio fertility clinics show procedures in place to safeguard eggs, embryos (photos, videos)," 25 Mar. 2018 Now, using mouse stem cells instead of the usual sperm and egg, scientists have created a structure like a blastocyst -- an early embryo. — Susan Scutti, CNN, "Embryo-like structure synthesized in a lab could help decipher infertility," 3 May 2018 Five days after the donor's eggs were harvested and fertilized, one blastocyst was transferred to my uterus. — Sarah Kowalski, Harper's BAZAAR, "The Misleading Promise of IVF for Women Over 40," 21 Feb. 2018 Then they are left in a petri dish to grow into what are called blastocysts. — Washington Post, "Social egg freezing is a numbers game that many women don't understand," 30 Jan. 2018These example sentences are selected automatically from various online news sources to reflect current usage of the word 'blastocyst.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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