A study was reported in which 20 professional technicians and 20 owner/inseminators were evaluated using the radiography technique. Each person inseminated a total of 20 reproductive tracts. Radiographs were taken to access inseminating gun placement. The data showed that only 39 percent of the gun tip placements were in the uterine body. A total of 25 percent of the gun tip placements were in the cervix. Twenty-three percent were in the right uterine horn, and 13 percent were in the left uterine horn. Sixty percent of the semen was distributed either in the cervix or disproportionately in one uterine horn.
Only 40 percent of the semen was located in the uterine body or equally distributed in both uterine horns. The normal ratio of ovulation or release of eggs is approximately 40 percent from the left ovary and 60 percent from the right ovary. Because migration of embryos is rare, the pregnancy ratio should be the same: 40 percent left uterine horn and 60 percent right uterine horn. This is an easy way to have your palpator to check on the job you are doing with correct semen placement. Data on 100 or more pregnancies are required for a proper evaluation.
Practice good semen handling techniques. Use chilled tweezers that are as long as possible and no fingers. Fill tanks before you do a large number of breeding. Have one person thawing and loading, while another inseminates.
You may improve your herd’s conception rate. Retraining may be necessary tomaster the expertise required for proper gun tip placement and insemination.Your cows can’t make up for your mistakes in improper semen handling andplacement. If using gender selected semen and/or 1/4cc straws, you have even morereason to be more precise.
Source: Georgia Dairyfax