This study aimed to confirm that pregnant cows could be used to study release rates of progesterone (P4), the hormone of ‘pregnancy’, from the CIDR device without compromising pregnancy. The seasonal nature of the New Zealand dairy operation presents only a brief window for large scale CIDR studies, if the treatment system is limited to non-pregnant cows.
Proceedings of the New Zealand Society of Animal Production, Volume 57, , 242, 1997
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