[Cagdu] FW: Japan: 1st dogs said born from frozen ova : National : DAILY YOMIURI ONLINE

Tue Sep 23 21:05:36 PDT 2008

Subject: Japan: 1st dogs said born from frozen ova : National : DAILY
YOMIURI ONLINE

DAILY YOMIURI ONLINE + AP Associated Press
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"http://www.yomiuri.co.jp/dy/national/20080922TDY03101.htm"http://www.yomiur
i.-co.jp/dy/-national/-20080922TDY03101-.htm

1st dogs said born from frozen ova

The Yomiuri Shimbun

SAPPORO--A Labrador retriever gave birth earlier this month to what are
claimed to be the world's first puppies born from transplanted frozen
fertilized
eggs--births that could lead toward alleviating the current shortage of
guide dogs in Japan.

A research team led by Prof. Hiroshi Suzuki, a specialist in developmental
engineering at Obihiro University of Agriculture and Veterinary Medicine,
transplanted
frozen fertilized ova of a Labrador retriever guide dog into another bitch
of the same breed.

It is important for guide dogs to be gentle and take easily to people. Even
after about a year's training, only 30 percent to 40 percent of dogs pass a
test to become a companion for blind people.

Potential guide dogs must be neutered before training to prevent them from
becoming distracted by sexual urges. So even if they are later judged to be
excellent
workers with a good temperament, they are unable to produce offspring.

Eggs taken from a bitch before it is neutered can be stored indefinitely
before being used for artificial semination.

This makes it easy to draw up a long-term breeding plan and could solve to
the current guide dog shortage.

Frozen fertilized eggs from guide dogs in training and breeding dogs were
transplanted into 3-year-old Maro, a bitch bred for experimental use at the
university
in Obihiro, Hokkaido.

Maro gave birth to three puppies on Sept. 8. Though one was stillborn, the
experiment was judged to have been a success.

According to Suzuki, the survival rate of fertilized eggs after freezing is
low, and there have been no other successful births to date.

To increase the survival rate of the eggs, Suzuki employed a method of
rapidly freezing them to minus 196 C to minimize cell damage.

The research was conducted in conjunction with the Sapporo-based Hokkaido
Guide Dogs for the Blind Association.

About 8,000 people nationwide have applied to own a guide dog, but only
about 1,000 such dogs are in active service.

(Sep. 22, 2008)
© The Yomiuri Shimbun.

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