A somatic cell-cloned calf named "Beibei" was born early yesterday morning in East China's Shandong Province, marking another breakthrough China has made in the field of cloning.
The female cloned calf was measured at 78 centimeters tall and 66 centimeters long, at a weight of 33 kilograms.
Sources with the Animal Embryo Engineering Center of Laiyang Agricultural College in Shandong said that researchers have used ovulation embryo transfer technologies as well as a process called "vaperification" to produce Beibei.
Before Beibei, the center had seen the successful birth of two cloned calves in November 2001, they were named "Kangkang" and "Shuang-shuang."
After inspections of the two calves revealed normal results, researchers with the center acquired 13 embryos from the two cloned calves using the ovulation embryo transfer technology in January of this year.
The 13 embryos have all met international embryo transfer standards and then been preserved by vaperification, a technology that can freeze embryos in a short amount of time, said Dr Dong Yajuan with the center.
Beibei was born after researchers transplanted part of the frozen embryos into the womb of a cow.
Insiders said the success of this experiment can provide technological support to the industrialization of embryo transfer technology.
(China Daily October 9, 2003)
