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Serum progesterone levels in cross bred heifers subjected to oestrus synchronisation with 4 and 9 day norgestomet ear implants



Serum progesterone levels in cross bred heifers subjected to oestrus synchronisation with 4 and 9 day norgestomet ear implants



Indian Journal of Animal Reproduction 12(1): 39-41



14 cyclic heifers were treated with 3 mg norgestomet ear implants for 4 or 9 days, and serum progesterone levels were measured at implant insertion, at 48 and 56 h after implant withdrawal, and at oestrus. All cows were mated at the following oestrus. Serum progesterone concentration declined from 3.46+or-2.26 ng/ml at implant insertion to 1.41+or-0.64 ng/ml at implant withdrawal.

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Accession: 002219841

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