A34—Lancaster Farming, Saturday, August 11,1984
Will 100 embryo splits be possible someda’ 9
BY JOYCE BUPP
Staff Correspondent
AIRVILLE - Dr. Alan Mc-
Cauley, who has literally tran
sferred thousands of embryonic
cells of life from donor cows to
recipient heifers, says the ability
of science to transfer life from one
system to another “still amazes
me.”
McCauley, who founded the Em-
Tran firm, located at
Elizabethtown, was the featured
speaker for the York Holstein
club’s annual field day, hosted at
the George Knight family’s
Woodbine Farms, R 2 Airville.
About 200 members and guests
gave up a day of hay baling
weather to question the
reproductive specialist, fellowship
over a barbequed chicken dinner
and judge classes of cows that
included a group of four aged-cow
Excellents, topped by a 92-point
member of the Knight herd.
Speaking to the group gathered
under the farm’s spreading shade
trees, McCauley said that embryo
transfer work has made him ap
preciate life. In fact, he related
that he still finds it hard to com
prehend that a cell can be
manipulated from one system to
another and still be a living,
healthy calf.
"It’s the people, though, that
have become the most rewarding
part,” claims McCauley, ad
mitting that the actual physical
transfer process becomes routine
with repetition
Praising the benefits of 4-H dub
involvement, the vet says he sees
“young things” as agriculture’s
greatest assets, whether they be
embryos or children.
He sees the future of farming as
“exciting and competitive, ’ and
predicts that ET technology will
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follow a path similar to that of the
development of artificial in
semination, only on a much more
rapid path of progression.
An admitted competitive in
dividual, McCauley sees keeping
up with rapid developments in the
industry part of the competition
angle of the ET business. To stay
abreast of new embryo-splitting
techniques being developed, Em-
Tran recently hired a specialist in
that field from Colorado State
University, where egg division was
pioneered.
New technology of embryo
splitting, adds McCauley, now
adds some value to formerly
useless unfertilized eggs. Shells of
these sterile eggs can beused to
insert the ova created by halving
fertilized cells.
Splitting is becoming so per
fected that, at Colorado Univer
sity, specialists implanted 35 eggs,
split in halves, into 70 recipients
during just one afternoon.
Dr. McCauley says he believes a
four-way egg split has already
been performed in Texas, and
projects that, theoretically, up to
one hundred divisions could
someday come from a single
fertilized egg.
In response to an audience
question, he explained that
identical twins resulting from
embryo splitting do not necessarily
have precisely the same coat
coloring, although thus far they
have been the same sex.
Transplant recipients have been
found to occasionally deliver more
than one calf from the documented
implantation of a single embryo,
leading reproductive specialists to
conclude that multiple birth
divisions take place beyond the
seven to eight day age of embryos
used in transplanting.
ON TOE GROW
In 1984
BRUNING
Embryo transfer specialist Dr. Alan
following talk at group's field day.
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