David Fleetham / Tiny Whitespotted bamboo shark (Chiloscyllium plagiosum) formed inside egg casing, Philippines.

Ashley Cooper / Llama (Lama glama) foetus for sale in the Witches Market in La Paz, Bolivia, South America.

Ashley Cooper / Aborted lamb foetus lying in field, UK.

Mark Taylor / Llama foetuses for sale in a La Paz market, Bolivia. December 2016.

Mark Taylor / Llama foetuses for sale in a La Paz market, Bolivia. December 2016. The "Witches' Market" stalls of La Paz are run by local witch doctors. Llama foetuses are believed to be good luck and are sometimes...

Suzi Eszterhas / Preserved specimen of Hoffmann's Two-toed Sloth (Choloepus hoffmanni) fetus, Aviarios Sloth Sanctuary, Costa Rica. * November 2014.

Nick Upton / Endoscope image of two foetuses within the uterus of a female Eurasian beaver (Castor fiber) observed while being checked for Tapeworms (Echinococcus multilocularis) by Royal Zoological Society of Sco...

Nick Upton / Veterinarian Romain Pizzi, of the Royal Zoological Society of Scotland using endoscope to check Eurasian beaver (Castor fiber) for Tapeworms (Echinococcus multilocularis) which is showing developing f...

Nick Upton / Veterinarian Romain Pizzi, using an endoscope to show foetuses in uterus of Eurasian beaver (Castor fiber). Beaver from an escaped population on the River Otter. Project overseen by Devon Wildlife Tru...

Nick Upton / Veterinarian Dewi Jones using an ultrasound scanner to look for a foetus inside a Holstein Friesian cow (Bos taurus) held in a crush, with the image projected onto goggles in front of his eyes, Wiltsh...

Nick Upton / Veterinarian Dewi Jones checking the image of a calf foetus on a screen recorded by an ultrasound scanner inside a Holstein Friesian cow (Bos taurus) held in a crush, Wiltshire, UK, September 2014. M...

Michael Durham / Preserved African elephant (Loxodonta africana) foetus in a glass jar, Education Center at the Chiangali Wildlife Orphanage, Bulawayo, Zimbabwe, November 2011.