Time of Insemination Relative to onset of Activity Threshold of Cow Manager ® is Associated with Pregnancy Risk When Using Gender Selected ™ Semen for Jersey Cattle-Juniper Publishers
JUNIPER PUBLISHERS - OPEN ACCESS JOURNAL OF DAIRY & VETERINARY SCIENCES Abstract Data from several research studies over the last five years in dairy and beef cattle have indicated that insemination closer to the time of ovulation than with conventional semen may improve conception rates. Previous data indicated that insemination between 8 to 16 post activity thresholds [Select Detect) was ideal for use with conventional semen in lactating Holstein cows [ 1 ]. A recent study [ 2 ] indicated that the optimal timing of insemination using an activity system [SCR Engineers ltd., Netanya, Israel) occurred somewhere between 23 to 41 h after the reaching the activity threshold activity level in lactating Jersey cows. The current study was designed to determine the optimal time of insemination in Jersey cattle (cows and heifers) based on the onset of activity defined by the Cow Manager® system. Materials and Methods ...