Semen Handling (Continued from Page 50) technique. Precise measurements of nearly 800 reproductive tracts revealed that the average length of the uterine body was only 5 /s of an inch, the size of a dime. There is not much room for error in place ment of the rod tip. Analysis of all inseminations in dicated only 39 percent of the rod tip placements were within the uterine body. Placements in the cervix, right uterine horn and left uterine horn were 25, 23, and 13 percnt, respectively. Considerable variation was found among inseminators. These in dividuals were likely representative of professional inseminators and herdsman-inseminators through out the country. Obviously, consistent placement of the rod tip within the uterine body is difficult. Subsequent to this study, research at Washington State University showed that retrograde movement of sperm into the vagina was 2-fold greater follow ing cervical insemination compared to uterine depo sition. If one assumes that 25 percent of inseminations may result in cervical deposition of semen, than there is significant loss of sperm. This isn’t an incomplete pass it is an interception. Make sure you extend the rod tip beyond the inter- ree Demonstration! mem mem INTERCOURSE pa ■ ■AAnMrn 800 732-0017 ■ ■ FOUR LOCATIONS ■ora nal cervical opening and be careful the rod tip is not inadvertently pulled back into the cervix during de position of the semen. • All inseminators should periodically attend a retraining course to review their technique and learn new developments. This is only a brief review of important concepts and potential problem areas related to A.I. proce dures. More detailed information can be obtained from your A.I. representative. Further information about insemination technique and semen handling can be obtained at the following Websites: www.das.psu.edu/reproduction/insem/index.html www.das.psu.edu/reproduction/check/pdf/ semen.pdf f f * > * VbitusOnluni McALISTERVILLE, PA 800 433-8670 MIDDLETOWN, DE 800 341-4028 SEAFORD, DE 800 843-3056 ' We Lew Cream Of manHou SS > Highest Hydraulic Capacities on the Market: Load-Sensing - 38 6PM with 3900 PSI > Excellent for Trench Silage De-Facing ► Shuttle Shift Torque Converter >■ Center-Mount Engine Stability ► Excellent Visibility >■ Easy Maintenance >■ Backed by Supreme's 1 -year money back Performance Guarantee >■ North America's First Manufacturer of Vertical Mixers >■ Patented Vertical Cylindrical Screw Design ► 3-Year warranty on gearboxes and planetary drives ► Many Unloading Options ► 2nd Cutter and Roller Mills Attachments Available
Significant historical Pennsylvania newspapers