CREW continues to make progress in improving the success of artificial insemination (AI) for propagating endangered
cats. In recent research, we incorporated treatment with oral progesterone (Regumate) into our AI protocol for domestic cats to down-regulate ovarian function prior to ovarian stimulation. This approach allows us to control ovarian activity more precisely and conduct AI procedures on a fixed time schedule.
Our first attempt using this method in exotic felids involved our fishing cat named Ratana,who was incapable of breeding naturally after losing a front leg due to injury. Ratana was fed a small amount of oral progesterone daily for one month to suppress her ovarian activity and then treated with gonadotropins to induce follicular growth and ovulation. Laparoscopic AI of both oviducts with freshly collected sperm from our resident male, named Gorton, resulted in conception and the birth of a male fishing cat kitten after a 69 day gestation.
This kitten was the first non-domestic cat born following the use of oral progesterone for fixed time AI, and represents the fifth cat species (fishing cat, ocelot, Pallas’ cat, tiger, domestic cat) that we have produced with oviductal AI. This new approach could greatly advance our capacity to use AI for the genetic management of endangered felid species.
April 11, 2014 1 Comment
Nikki gave birth early this morning to the world’s first live Indian rhino calf produced by artificial insemination (AI). She delivered a male calf at 6:06 a.m. in her indoor stall. Currently, the calf is in critical condition with Zoo staff working diligently to feed and stabilize him. Meanwhile, Nikki is doing well and will remain indoors.
Nikki has been monitored 24 hours a day since the first of October. Nikki became increasingly restless throughout Monday evening into the night. Cincinnati Zoo Volunteer Observers called Zoo staff in early Tuesday morning. Nikki delivered her calf while volunteer and staff watched anxiously via a live video feed. As soon as the calf was born, not moving or breathing, Zoo staff immediately jumped into action to assist and resuscitate the calf. The calf has been successfully breathing on its own since.
“The staff here at the Zoo is working tirelessly to do everything possible to support this calf,” said Dr. Monica Stoops, CREW Reproductive Physiologist and project leader at the Cincinnati Zoo & Botanical Garden. “We will continue to work to assist him during this critical period.”
Not only is this the world’s first successful live birth of an endangered Indian rhino conceived by artificial insemination (AI), but it is also the world’s first Indian rhino produced with frozen-thawed sperm.
October 27, 2010 11 Comments
Today is day 480 of Nikki’s pregnancy. Indian rhinos are pregnant for 462 – 491 days, so she could deliver her calf any day. Many visitors ask the same questions when they’re watching Nikki, so here are the answers to your FAQs…
Q: Why doesn’t she have water in her pool?
A: The water temperature is too cool for Nikki and would be too cool for the baby. She still has access to plenty of drinking water.
Q: Does she give birth lying down?
A: She’ll probably be lying down for the final push but goes up and down during labor.
Q: How long does labor last?
A: About 3 hours.
Q: How much will the calf weigh?
A: 80 – 100 pounds
Q: How much does Nikki weigh?
A: 4,299 pounds!!
Q: When will the calf start to nurse?
A: About 30 minutes – 2 hours after birth
If you have any other questions, please post them.
October 19, 2010 26 Comments