Embryo Placement in the Uterus
Recently there has been some discussion regarding establishment of a pregnancy when the embryo is placed in the incorrect uterine horn, referred to as the contralateral horn,
which is the side not containing the corpus luteum (CL) on the ovary.
Some reports claim pregnancies are established in these cases, although they usually are lost. While other experienced embryo transfer technicians have not observed this phenomena. Bear in mind 20% of Holsteins and Simmentals exibit two CLs per cycle in which side of delivery is of no consequence.
Several years ago in order to settle the argument we conducted a small experiment, placing 20 embryos in the horn opposite to the CL and another 20 embryos in the horn next to the CL. Pregnancy rates were 0 and 65 %, respectively. In conclusion, based on the facts, place the embryo in the horn next to the CL.
Dr. Peter Elsden
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"The majority of our insight to embryo transfer is definitely accredited to Dr. Peter Elsden. The pragmatic experiences and personal attention offered through The International Embryo Transfer School are highly commendable."… "An example of the benefits to our embryo transfer program, made possible by The International Embryo Transfer School, is a cow that produces embryos for only $20 a piece. Each embryo is valued at $1,500 or more! We hold Dr. Peter Elsden and International Embryo Transfer School with our highest regard, as they are largely responsible for our accomplishments."
Bob & Robin Stevenson
Stevenson Angus Ranch