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Lecture Notes on Veterinary Obstetrics, VCT 601 PPT

BOVINE PREGNANCY AND ITS DIAGNOSIS. Indication for Bovine Px Dx: to detect those non-pregnant so that appropriate measure(s) can be taken.NB:Age at 1st calving is approx 24mos for dairy cows and subsequently at 13-13.5mos intervalsAfter ~60days post insem foetal death rates are low. Pregnanc

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Lecture Notes on Veterinary Obstetrics, VCT 601 PPT

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    1. Lecture Notes on Veterinary Obstetrics, VCT 601 (PPT) BY S.’Tona Olurode,DVM,MVSc.(Theriogenology) COLVET, UNAAB

    2. BOVINE PREGNANCY AND ITS DIAGNOSIS Indication for Bovine Px Dx: to detect those non-pregnant so that appropriate measure(s) can be taken. NB: Age at 1st calving is approx 24mos for dairy cows and subsequently at 13-13.5mos intervals After ~60days post insem foetal death rates are low

    3. Pregnancy diagnosis Methods used grouped under the following subheadings: Management Chemical or laboratory method Clinical examination Ultrasonography

    4. Managemental methods of px dx Non-return to oestrus and CL persistence History of exposure of cow to a bull or A.I. Mammary gld devpt (useful only in primigravida) Abdominal ballottment possible at ~7mos of gestation in small breeds such as jersey

    5. Chemical or Laboratory methods EPF/ECF demonstration in serum or milk via commercial test kits using the ‘dip stick’ principle; early in 3days or later in 7-8 days Progesterone assay in plasma & milk using RIA or ELISA. Blood sample collected 21days post previous oestrus. Assay of px-specific protein B via RIA good tool for twins identification Oestrone SO4 in milk

    6. Clinical methods Transrectal palpation, can be done as early as 30days in heifers and 35days in cows. (disadvantages – much practice is reqd) -uterine assymmetry -membrane/foetal slip (see table 1 for the ‘rule of thumb’)

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