Abdurraouf Gaja
University of Tripoli
Libya
Title: Trans-rectal ultrasonography for early pregnancy diagnosis in cattle
Biography
Biography: Abdurraouf Gaja
Abstract
For higher economic benefits, early pregnancy diagnosis in cows is considered as one of the very important procedure used to improve fecundity and therefore, the field managemental scales in cattle industry. Performing Transrectal Ultrasonography for measuring corpus luteum cross-sectional area changes twice at 7 days apart (on days 13 and 20, 14 and 21, 15 and 22 and 16 and 23 post-insemination) proved the full success of the method which has been practiced on 200 Japanese Black Cows. A quick result, in the field, with high sensitivity (100%) was proved in detecting early non-pregnancy in the field, which helps in beneficial effects of re-insemination of such cows using some reproductive hormones (GnRH analogue), to control ovulation as well as timed insemination in an aim to decrease inter insemination period, and inter calving period. All non-pregnant cows showed clear significant regression in their corpora lutea between days 14 and 20 post insemination, while no regression in the corpora lutea was noticed in all pregnant cows during the same period. Also, the method proved that it was very helpful in detecting ovarian disorders at early stages which could be treated at early times, to decrease the expenses through shortening the days open. Detection of peripheral plasma progesterone levels was helpful as well to prove the above mentioned method in parallel waves.