These findings are consistent with the current view that Cetacea are nested within Artiodactyla as sister group to the hippopotamids. The endometrium was well vascularised and richly supplied with actively secreting glands. However, there were also areolar regions with tall columnar trophoblast and these were more sparsely supplied with capillaries. Most was of the simple columnar type and indented by fetal capillaries. Two different types of trophoblastic epithelium were seen. The interhemal membrane of the placenta was of the epitheliochorial type. Foci of squamous metaplasia occurred in the allanto-amnion and allantochorion. Small blood vessels and smooth muscle bundles were found within the stroma of the cord. The umbilical cord branched to supply a bilobed allantoic sac. We studied the placentae of two sympatric species of dolphin from the Amazon River Basin, representing two distinct families. Our fact-check work is supported in part by a grant from Facebook.A recent reassessment of the phylogenetic affinities of cetaceans makes it timely to compare their placentation with that of the artiodactyls. You can subscribe to our print edition, ad-free app or electronic newspaper replica here. 29, 2006, ' Unborn elephant' photos were of modelsĪrtem, accessed May 15, Animals In The Womb 30, 2020, Ultrasonographic findings associated with normal pregnancy and fetal well-being in the bottlenose dolphin (Tursiops truncatus) 8, 2006, Animals in utero: An inside view Global Ecology and Conservation, April 2022, Ethical considerations in natural history film production and the need for industry-wide best practiceĮncyclopedia of Marine Mammals (Third Edition), accessed May 15, EmbryologyĬNET, Dec. National Geographic, accessed May 15, IN THE WOMBĭavid Barlow Film Archive, accessed May 15, Dolphin Birth ModelīBC News, April 30, 2010, Animals need 'right to privacy' from wildlife films
![dolphin fetus dolphin fetus](https://i.pinimg.com/736x/42/d9/38/42d9382bbcc8f0cce743a9a1e9b7084c--baby-dolphins-dolphins-animal.jpg)
20, 2010, In the Womb (2005), by Toby Mcdonald and National Geographic Channel Our fact-check sources:ĪFP Fact Check, May 9, 2021, This image shows a silicone model foetus created for a film - it does not show a real dolphin’s womb The dolphin fetus image was created using computer graphics for a 2005 National Geographic special, though experts say it's largely consistent with reality. Our rating: Missing contextīased on our research, we rate MISSING CONTEXT the claim that a photo shows a dolphin baby inside a mother's womb, because without additional information it could be misleading. But she said a dolphin fetus that looks as much like a full-grown dolphin as the one in the image would likely be farther along in development, meaning it wouldn't have as much room in the womb as the image shows. The curved umbilical cord and fetus are accurate components of the silicone models, according to Roston. "There's a huge continuum on what a fetus can look like at different stages of development."įact check: Image of overcrowded ship shows Albanian refugees fleeing to Italy in 1991 in 11 to 12 months," said Rachel Roston, a postdoctoral researcher at the University of Washington School of Dentistry who has studied dolphin development.
![dolphin fetus dolphin fetus](http://bioweb.uwlax.edu/bio203/f2013/edgar_mich/800px-Dolphin_embryo.jpg)
"A fetus grows from single cells to a birth length of about 3 feet. "The gestation period for bottlenose dolphins is 12 months, and they do look similar to the model in the photograph," said Vicky Thayer, a marine mammal stranding coordinator at North Carolina State University.Ī few studies have indicated the size a certain maturity of a dolphin should be. Experts say image is largely accurateĮxperts say the image is generally consistent with what dolphins look like in the womb. Using models instead "avoids the ethical and practical issues that result from filming live animals, Barlow explained on his website.
![dolphin fetus dolphin fetus](https://i.pinimg.com/originals/a1/f3/a4/a1f3a4df043dd9881368201d0505b02b.jpg)
Impact on animals has long been a source of ethical concern in wildlife documentaries. They used computer graphics and 4-D ultrasound scans to create the appearance of movement in the womb during gestation.Ĭinematographer David Barlow developed representations of a silicone model of the fetus for the film, along with models for a penguin, elephant and dog.įact check: Warming varies across oceans and atmosphere, doesn't contradict climate change Special effects company Artem created the silicone model of a dolphin fetus for the National Geographic film that also aired on the British television network Channel 4 in March 2005.Īrtem's creative designers and special effects technicians built models of the mammals in clay and molded them in silicone, according to The Guardian.
![dolphin fetus dolphin fetus](https://i.pinimg.com/originals/a4/32/56/a432565b92aaef51c11c0ac506e75241.jpg)
USA TODAY reached out to the Facebook user who shared the claim for comment. Fact check: Underwater sculptures created to symbolize unity, aid coral growth, not honor drowned slaves