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Abstract

One aim of this study was to compare the reproductive performance of cows and heifers when resynchronizing returns to oestrus for a second insemination by treating with an intravaginal progesterone-releasing device (IVD) for 7 or 8 d when estradiol benzoate (EB) was administered at the start of...

Author(s)
Cavalieri, J.; Hepworth, G.; Smart, V. M.; Ryan, M.; Macmillan, K. L.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2007, 67, 4, pp 824-834
Abstract

Calving records were obtained from 1617 heifers in 26 herds which were part of the GenermateTM synchrony programme. Each heifer was fitted with a controlled internal drug-releasing (CIDR) device which released progesterone over a 10-day period. Oestradiol benzoate (10 mg) was given at the time of...

Author(s)
Cliff, S. C.; Morris, G. R.; Hook, I. S.; MacMillan, K. L.
Citation
Proceedings of the New Zealand Society of Animal Production, 1995, 55, pp 70-71