In January 2021, the Oklahoma City Zoo released ultrasound footage of an Asian elephant calf growing inside its mother, Asha. The grainy video showed the outline of a tiny trunk, ears and legs about eight months into a pregnancy that would last nearly two years. The story had a happy ending: on 20 January 2022, Asha gave birth to a healthy male calf named Rama.
Here is how an elephant ultrasound works, why the zoo could carry one out without sedation, and what the birth means for a species that is endangered in the wild.
What the ultrasound showed
When the footage was shared, Asha was 25 years old and roughly eight months pregnant with her fourth calf. Veterinarians used the scan to check that both mother and calf were healthy, and the zoo reported that they were. The video is brief, but recognisable shapes appear on screen: the curve of the head, the developing trunk and the flapping outline of large ears.
For the public, the clip was a rare look at a stage of elephant life that is normally hidden. For the care team, it was one routine check in a long series. ZooBorns later reported that the veterinary staff ran ultrasounds and hormone tests throughout the pregnancy.
How do you scan a pregnant elephant?
An elephant ultrasound uses the same principle as a human one: a probe sends high-frequency sound into the body and builds an image from the echoes. The difference is scale. Elephant skin is thick and the uterus lies deep in a very large abdomen, so vets often scan from more than one angle, and in early pregnancy may scan internally.
The key ingredient is cooperation. Rachel Emory, the zoo's curator of elephants and rhinos, explained at the time that Asha took part in training sessions voluntarily and was rewarded with treats such as watermelon, cantaloupe and bananas. Her everyday diet was hay, grass and her favourite, tree branches. Training an elephant to stand calmly for a procedure lets keepers provide medical care without restraint or anaesthetic, which is safer for the animal and the staff. Asha also kept exercising with the herd and joined weekly sessions to prepare for the birth.
Why elephant pregnancies last so long
Asian elephants have one of the longest pregnancies of any mammal, usually 18 to 22 months. The long gestation allows the calf's brain and body to develop enough that it can stand and walk within hours of birth and keep up with a moving herd. Newborns typically weigh around 100 kg (220 lb).
Because of that timescale, the 2021 announcement was really a promise of something more than a year away. Late in the pregnancy, keepers watched hormone levels closely. According to ZooBorns, a sharp drop in Asha's progesterone on 18 January 2022 told the team the birth was close.
Meet Rama, born in January 2022
Asha delivered a male calf on the evening of 20 January 2022 in the elephant barn of the zoo's Sanctuary Asia habitat. He was named Rama, a Sanskrit word often translated as "pleasing". His father is Rex, then 53. Rama's arrival brought the zoo's herd to eight Asian elephants.
Elephant herds are built around related females. In the wild, daughters usually stay with their mothers for life, while young males drift away in adolescence and live alone or in loose bachelor groups. Zoos with multigenerational herds try to mirror that structure, so calves grow up learning from aunts, older siblings and their mother.
That family support matters from the first hours. A newborn has to learn to use its trunk, which starts out as a floppy, hard-to-control limb, and it relies on its mother's milk for many months while it slowly learns to eat plants. Other females often help guard and guide the youngster, a behaviour known as allomothering. In a zoo, keepers watch these early days closely, checking that the calf is nursing well and gaining weight, and that the mother and the rest of the herd accept the newcomer calmly.
Why one calf matters for Asian elephants
The Asian elephant has been listed as endangered by the IUCN since 1986. Its wild population, estimated at roughly 48,000 to 52,000 animals in 2019, has fallen by at least half over three generations. The main pressures are habitat loss and fragmentation, conflict with people over crops and land, and poaching for ivory, meat and skin.
Emory described the zoo's view in 2021, saying every pregnancy is valuable to the survival of this beloved animal
. It is fair to add some context. Captive elephant populations in North America are not self-sustaining, first-year calf mortality has historically been high, and the long-term survival of the species depends mostly on protecting wild herds and their habitat. Zoos argue that well-managed breeding, research and public education support that work; critics question whether elephants should be kept in captivity at all. Both views are part of the conversation around stories like this one.
What the story shows
The most interesting part of Asha's story is less the image itself than the relationship behind it: a large, intelligent animal choosing to stand still for a scan because trust and rewards have been built up over years. That same approach underpins much of modern zoo veterinary care. The ultrasound gave the public a glimpse of a calf on the way; nearly a year later, Rama arrived to complete the story.
Sources: ZooBorns: OKC Zoo celebrates birth of endangered Asian elephant calf (21 January 2022); Wikipedia: Asian elephant. Video: Oklahoma City Zoo. Earlier reporting: FOX 10, My Modern Met.
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