Related Biometrical Changes in the Ovaries and Uterus of the Red Bororo Cattle in Maiduguri, Nigeria

Pregnancy related biometrical changes in apparently normal ovaries and uterus of 30 pregnant and 10 non - pregnant Red Bororo cows were undertaken in Maiduguri using abattoir samples, with the objective ofproviding baseline data on this aspect. Analysis of the dimensions showed steady increase (P<0.05 to P<0.001) in sizes of the ovaries and uteri along the trimesters of gestation. The right ovary was larger in size and heavier in weight than the left ovary both in pregnant and non – pregnant states. The right uterine horn was larger in size than the left uterine horn, thus suggesting their natural activities. The cervix showed levels of significant reduction (P<0.05 to P<0.01) in length and attendant increases in diameter from first trimester of gestation to full term, signifying the usefulness of the contraction of the sphincter muscles in the sealing of the cervix during pregnancy. In conclusion, the results of this study haveestablished the baseline for the dimensions of ovaries and uterus of the pregnant and non – pregnant Red Bororo cows of Nigeria. This information will make diagnosis of various abnormalities of these organs easierin both physiological states.Key words: Biometry, Ovary, Pregnancy, Red Bororo cow, Uteru