How to Use blastocyst in a Sentence

blastocyst

noun
  • Then they are left in a petri dish to grow into what are called blastocysts.
    — Washington Post, 30 Jan. 2018
  • By this time the embryo has reached the hollow ball stage, called a blastocyst.
    — Literary Hub, 20 Feb. 2026
  • For now, these early embryos, called blastocysts, have been frozen.
    — NBC News, 4 July 2018
  • The team then took stem cells from rats and injected them into pig blastocysts.
    — Photograph Courtesy Juan Carlos Izpisua Belmonte, National Geographic, 26 Jan. 2017
  • During this stage, more cell division takes place, and your blastocyst takes a ball-like shape.
    — ​wendy Wisner, Parents, 18 Nov. 2023
  • Embryos that survive to the blastocyst stage stand a good chance of implantation once placed in the uterus.
    — Isabella Cueto, STAT, 30 Nov. 2021
  • My twins were formed when a blastocyst collapsed in on itself—but then, instead of dying, doubled.
    — Sarah Stewart Johnson, The New Yorker, 4 Oct. 2020
  • But to keep growing, a blastocyst had to embed itself into the lining of a mother’s uterus.
    — Amos Zeeberg (discover Web Editor), Discover Magazine, 15 July 2010
  • Fail to mature a reprogrammed egg into a blastocyst, and there’s no embryo to even transfer.
    — Damon Casarez, Popular Mechanics, 2 Aug. 2021
  • Five days after the donor's eggs were harvested and fertilized, one blastocyst was transferred to my uterus.
    — Sarah Kowalski, Harper's BAZAAR, 21 Feb. 2018
  • Freeman didn’t think about the cells in her uterus as embryos or blastocysts or possibilities.
    — Sara Harrison, ELLE, 17 Aug. 2023
  • About five to six days after fertilization, an early-stage embryo, called a blastocyst, forms.
    — Brian Barrett, WIRED, 27 Feb. 2024
  • With this defining feature, the zygote becomes a blastocyst, ready to embed itself in the lining of the uterus.
    — Clare Watson, Quanta Magazine, 27 Feb. 2026
  • One way in which researchers have tried to delve into events after the blastocyst stage is by producing ersatz embryos from mouse stem cells.
    — Bymitch Leslie, science.org, 17 June 2023
  • Inside the chip, both blastocysts and blastoids went through the full implantation sequence.
    — Rupendra Brahambhatt, Interesting Engineering, 10 Jan. 2026
  • The cells are stem cells that can be used as regenerative medicine treatments in the person from whom the blastula or blastocyst was made.
    — David Warmflash, Discover Magazine, 13 Dec. 2016
  • Water in the blastocysts cells is replaced with a cryoprotectant, which functions like antifreeze.
    — Ginger Christ and Julie Washington, cleveland.com, 25 Mar. 2018
  • Many miscarriages occur during this stage, for example, and a blastocyst can also split to create twins.
    — Mitch Leslie, Science | AAAS, 17 Mar. 2021
  • Of the four embryos that survived to the blastocyst stage, only two were genetically normal.
    — Akhil Sharma, The New Yorker, 24 Jan. 2022
  • 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, 5 May 2018
  • But there could be other cells in the blastocyst that have unaltered GJB2 genes or off-target changes.
    — Jon Cohen, Science | AAAS, 21 Oct. 2019
  • His team showed that mouse stem cells can self-organize into structures that resemble a blastocyst, which forms five or six days after sperm fertilizes an egg.
    — Jennifer Ouellette, Ars Technica, 7 Apr. 2023
  • Under certain culture conditions, the cells can form each of the three cell types in the blastocyst, researchers previously found.
    — Mitch Leslie, Science | AAAS, 17 Mar. 2021
  • Meanwhile my body was prepped to mimic the phase of my cycle optimal for implantation of a blastocyst, or fertilized egg.
    — Sarah Kowalski, Harper's BAZAAR, 21 Feb. 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, 3 May 2018
  • The teams behind the new work hope their blastocyst-like models could provide a ready supply of stand-ins for the real thing and a better imitation than mouse blastoids.
    — Andrew Joseph, STAT, 19 Mar. 2021
  • Finally—about five to six days after fertilization—the blastocyst implants itself into the uterus.
    — ​wendy Wisner, Parents, 18 Nov. 2023
  • These add-ons include blastocyst culture, where the embryo is allowed to grow in the lab for five days instead of the usual three, before being transferred to a woman’s uterus.
    — Sandy Ong, Newsweek, 12 Jan. 2017
  • The researchers then attempted a similar procedure injecting rat stem cells into pig blastocysts.
    — Jason Daley, Smithsonian, 27 Jan. 2017
  • There’s also the waiting period—waiting to see if and how many eggs would fertilize and how many would make it to the blastocyst stage, which happens about five to six days after the sperm fertilizes the egg.
    — Anna Halkidis, Parents, 9 Dec. 2025

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

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