Abstract
Choice of method for diagnosing pregnancy in sheep and goats depends on the stage of gestation. Some methods give a higher degree of accuracy at the early stage of gestation, others at the late stage of gestation. Estimation of pregnancy based on hormonal assays of blood plasma, serum or milk, and estimation of pregnancy-specific antigens or proteins give a higher degree of accuracy within 30 days of pregnancy. Ultrasonic pregnancy detectors can detect pregnancy at 50–70 days post-breeding with over 90% accuracy. Some real time ultrasound scanners can diagnose pregnancy at 40–45 days post-breeding with 90% accuracy. Similarly by laparoscopy it is possible to diagnose pregnancy at 30–40 days of gestation. In addition, several other methods are also used for pregnancy diagnosis in sheep and goats. The evaluation of different methods has been discussed.
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