RELATIONSHIP OF SERUM PROGESTERONE PROFILES BEFORE, DURING AND AFTER OESTRUS AND ESTABLISHMENT OF PREGNANCY IN REPEAT BREEDER COWS
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Date
2010
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Abstract
An experiment was conducted to study the effect of progesterone before, during and after AI in repeat breeder
crossbred cows. A total of 16 repeat breeder cows were artificially inseminated twice at 24 hours interval
following sexual rest of one oestrous cycle. Blood samples were collected from all the cows on day 10
of oestrous cycle preceding AI, at the time of first AI (oestrus) and at second, fourth and 6th day following
first AI for progesterone assay. The first service conception rate observed was 18.75 per cent. The mean
serum progesterone levels on corresponding days of blood collection in cows which became pregnant was
7.19±0.46, 0.36±0.08, 1.05±0.20, 1.70±0.22 and 3.37±0.77 ng/ml, respectively and the values in cows which
did not conceive were 5.24±0.43, 0.51±0.09, 0.57±0.15, 0.99±0.27 and 1.62±0.26 ng/ml.
Description
TNV_IJFV_2010_5(3)25-26
Keywords
Veterinary Science