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The first successfully cloned mammal was Dolly, a sheep, born on 5th July 1996 at Roslin Institute, Scotland. The cloned sheep was named after the American singer Dolly Parton. Dolly lived for seven years and died of respiratory complications, which is speculated to be due to the actual age of her DNA. Because the DNA in cloned cells belongs to an older individual, the cloned individual’s life expectancy may be affected. Indeed, analysis of Dolly’s DNA revealed shorter...

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Minimally Invasive Embryo Transfer and Embryo Vitrification at the Optimal Embryo Stage in Rabbit Model

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Published on: May 16, 2019

Embryo technologies in donkeys (Equus Asinus).

Duccio Panzani¹, Diana Fanelli¹, Francesco Camillo¹

¹Dipartimento di Scienze Veterinarie, Università di Pisa, Italy.

|July 25, 2020

Summary

European donkey breeds face extinction due to population decline. Embryo technologies offer a conservation tool, but their application in donkeys, including cryopreserved embryo transfer and in vitro fertilization, requires further development and funding.

Keywords:

Cryopreservation Donkey Embryo transfer Pregnancy

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Area of Science:

Veterinary Science
Reproductive Biology
Conservation Biology

Background:

Donkey populations in industrialized nations have declined significantly over the past century, endangering European breeds.
Embryo technologies are established conservation tools for endangered equid species, such as Equus Przewalskii.

Purpose of the Study:

To review the current status and potential of embryo technologies for donkey conservation.
To highlight the need for advancements in donkey embryo transfer and in vitro fertilization.

Main Methods:

Review of existing literature on donkey reproduction and embryo technologies.
Analysis of the application of embryo transfer and in vitro fertilization in equids.

Main Results:

Pregnancies are achievable via embryo transfer in synchronized donkey recipients, but it's not a widespread technique.
Success rates for cryopreserved embryo transfer are low, with few resulting foals.
No pregnancies have been reported to date from in vitro fertilization attempts in donkeys.

Conclusions:

The potential use of donkeys as dairy animals and the urgent need for conservation of endangered breeds can drive the development of embryo technologies.
Increased funding from research agencies is crucial for advancing these reproductive techniques in donkeys, particularly in Europe.