Abstract
Pregnancy-associated glycoproteins (PAGs) are considered to be a large gene family in the trophoblasts of ruminants. PAGs determination precisely, PAG-1 in serum has been as the solid ground for pregnancy diagnosis in cow. Unluckily the PAG-1 and the antigenically related PAGs show a long half-life in serum less than 8 days and can be assessed 80 to 100 das postpartum, thereafter giving false results in cows bred within 60 days of calving. This study involves using novel polyclonal antibodies after immunizing rabbits and purification of the produced antibodies. The cattle are pregnant when the PAG hormone level is measured in a high level in a serum sample from the animal. It could give a precise method of detecting pregnancy at the early with few false positive results.
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