How to Use placental in a Sentence

placental

1 of 2 adjective
  • But in the human embryo knockouts, placental cells and yolk sac cells also failed to form.
    — Gretchen Vogel, Science | AAAS, 20 Sep. 2017
  • But evidence is scant as to whether the virus can cross the placental barrier to infect the fetus.
    — Linda Marsa, Discover Magazine, 30 June 2020
  • The study team also looked at placental tissue collected at the time of birth for some of the participants.
    — Katie Hunt, CNN, 16 Nov. 2021
  • In contrast, placental mammals, which give birth to live offspring, have young that start out relatively large.
    — Michael D. D'emic, Scientific American, 1 Sep. 2023
  • Now, researchers have devised a way to derive and observe early precursors of placental cells in a dish.
    — Kelly Servick, Science | AAAS, 30 Sep. 2020
  • Placental mammals all develop inside a uterus, drawing blood from their mothers.
    — Carl Zimmer, The Seattle Times, 11 Aug. 2017
  • These types of sharks even have a placental connection similar to the umbilical cord of a mammal.
    — Clare Mulroy, USA TODAY, 18 Apr. 2023
  • In 2018, the first placental organoids were grown from trophoblasts – cells found only in the placenta.
    — Neetika Walter, Interesting Engineering, 15 Sep. 2025
  • By stopping this activation, the researchers managed to cure the placental defects in some of the mouse embryos.
    — Joshua Rapp Learn, Discover Magazine, 6 July 2022
  • This second test is more invasive, and involves taking samples of fetal or placental tissue.
    — Clayton Dalton, The New Yorker, 16 Sep. 2020
  • The woman had suffered a placental abruption and had to be rushed into an emergency cesarean section.
    — Bracey Harris, NBC News, 18 Nov. 2023
  • In the same year, Teigen wrote in an essay explaining that doctors diagnosed her with a partial placental abruption.
    — Charles Trepany, USA TODAY, 3 Aug. 2022
  • There was her placental abruption, a rare condition where part of the placenta separates from the abdominal wall, which led to bed rest.
    — Patia Braithwaite, SELF, 30 Sep. 2019
  • Rather, they are placed there because the focus of many of those trees is on placental mammals, such as humans, other primates, carnivores, rodents and so on.
    — Kevin Omland, The Conversation, 9 Feb. 2026
  • This abuse was part of a larger prejudice against marsupials that is sometimes called placental chauvinism.
    — Brooke Jarvis, The New Yorker, 16 Jan. 2012
  • To figure out how chromosomes of placental mammals have changed over time, researchers need to know what those early eutherians started with.
    — Elizabeth Pennisi, Science | AAAS, 19 June 2017
  • There are some biologics that can cross the placental barrier and potentially reach the fetus.
    — Stephanie Watson, SELF, 21 Apr. 2022
  • Celularity is exploring the use of placental stem cells to replace or repair defective genes at the heart of major diseases.
    — Robin L. Smith, WSJ, 24 May 2021
  • The new treatment is made from placental tissue that has been ground into a powder, added to a liquid solution and injected at the source of osteoarthritis.
    — Andy Peters, ajc, 11 Apr. 2022
  • Further research needs to be done to evaluate the long-term effectiveness of treatments using placental extracts.
    — Shalwah Evans, Essence, 16 Oct. 2019
  • In contrast, in a tree focused on marsupials, one or two placental mammals could be included at the bottom of the page for comparison.
    — Kevin Omland, The Conversation, 9 Feb. 2026
  • Because of this, the animals are likely to more clearly show effects of atrazine that might be happening more subtly in placental mammals, Graves says.
    — Corryn Wetzel, National Geographic, 9 Sep. 2020
  • About a month ahead of her due date, Sophie experienced a placental abruption and had an emergency cesarean section.
    — Jacqueline Weiss, Peoplemag, 3 May 2023
  • The baby, who was subsequently delivered early, had not been getting oxygen due to a placental abruption caused by the crash, the affidavit said.
    — Jacob Beltran, San Antonio Express-News, 18 Mar. 2022
  • The report said the spike protein in coronavirus is the same as another spike protein called syncytin-1, which is involved in placental growth during pregnancy.
    — Carmina Tiscareño, Dallas News, 4 Feb. 2021
  • To measure telomere length, the researchers extracted DNA from each baby's cord blood and placental tissue.
    — Susan Scutti, CNN, 16 Oct. 2017
  • In a Medium post on Tuesday, Teigen explained that her doctors had diagnosed her with a partial placental abruption.
    — NBC News, 1 Oct. 2020
  • Then, in the petri dish, endothelial cells and the placental pericytes begin to assemble themselves into tiny vascular networks.
    — Emily Matchar, Smithsonian, 18 Nov. 2019
  • The same stress hormones that speed up the placental clock also trigger the immune system to release inflammatory chemicals that tell the body to attack itself.
    — Mark Johnson, Milwaukee Journal Sentinel, 23 Aug. 2021
  • Quake compared the activity of genes found in the mother’s blood, which included the proteins, enzymes and other products made by the mother’s genes, placental genes and fetal genes.
    — Alice Park, Time, 7 June 2018

placental

2 of 2 noun
  • The complication, known as placental abruption, can lead to stillbirth.
    — Maira Garcia, Los Angeles Times, 5 May 2023
  • For example, the specific type of placental cell where Zika can lurk in humans isn't thought to be present in mouse placentas.
    — latimes.com, 10 June 2019
  • For example, the specific type of placental cell where Zika can lurk in humans isn’t thought to be present in mouse placentas.
    — Washington Post, 9 June 2019
  • Because the navel is a scar from where the umbilical cord connected the fetus to the placenta, all placental mammals have them.
    — Sarah Leupen, The Conversation, 5 Apr. 2023
  • Origolestes is an ancestor to therian mammals, the group that includes all placentals and marsupials alive today.
    — Jim Daley, Scientific American, 5 Dec. 2019
  • People who've had a previous placental abruption, abdominal trauma, preeclampsia, or high blood pressure are most at risk.
    — Rebecca Stewart, Parents, 6 Sep. 2023
  • The placentals include all living mammals except marsupials and monotremes.
    — Encyclopedia Britannica, 2 Apr. 2026
  • The early evolution of mammals is a little bit murky, with some placental mammals even likely living alongside dinosaurs and others arising much later.
    — Laura Baisas, Popular Science, 4 Apr. 2024
  • It can also be transmitted through aborted fetuses, placental fluids or placentas from infected horses.
    — Steven Yablonski, CBS News, 21 Nov. 2025
  • Marsupials seem to be substantially different from placental mammals, while primates are different from placentals as a whole.
    — Razib Khan, Discover Magazine, 7 Sep. 2010
  • To do so, the researchers isolated special placental cells called trophoblasts from human placentas that were terminated at six to nine weeks’ gestation for medical reasons with ethical approval.
    — Roni Dengler, Discover Magazine, 29 Nov. 2018
  • The true placenta of the placentals allows for a longer developmental period within the protection of the womb, a factor considered to have contributed to the evolutionary success of the group.
    — Encyclopedia Britannica, 2 Apr. 2026
  • The researchers reported that the Zika virus binds consistently to a protein in different placental cells called TIM1.
    — Pam Belluck, New York Times, 18 July 2016
  • Some investigators think that malnutrition and faulty placental function may change the way a baby's genes direct its development during pregnancy—but the mechanics that underlie this process are unknown.
    — Adrian Erlebacher, Scientific American, 1 Oct. 2017
  • The TikTok concludes with photos captured after Oakley’s stillbirth, which Fish attributed to the placental abruption, which occurs when the placenta pulls away from the uterine wall.
    — Zoey Lyttle, Peoplemag, 27 June 2024
  • Untangling the genealogical relationships of these archaic placentals is challenging.
    — Steve Brusatte, Scientific American, 1 June 2022
  • The lawsuit states that over the following several hours, Caswell experienced heavy bleeding when her placenta detached from the womb — a serious complication known as placental abruption that can cause severe bleeding and abdominal pain.
    — María Luisa Paúl, Washington Post, 17 Oct. 2023
  • Each increase of 5 micrograms per cubic meter in exposure was associated with 9% shorter cord blood telomeres and 13% shorter placental telomeres, the researchers estimated.
    — Susan Scutti, CNN, 16 Oct. 2017
  • Carrying twins also elevates the risks for gestational diabetes (and about half of those affected will later develop Type 2 diabetes), placental abruption, anemia and postpartum hemorrhage.
    — Kwame Anthony Appiah, New York Times, 28 Oct. 2023

Some of these examples are programmatically compiled from various online sources to illustrate current usage of the word 'placental.' 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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