@conference {40359,
	title = {Optimization of {\textquoteright}herd-in-calf rate{\textquoteright} with respect to the length of the postpartum anoestrous period in Angus cows suckling calves},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {51},
	year = {1991},
	month = {Jan},
	pages = {459-464},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {A trial was undertaken to evaluate the effectiveness of the  CIDR-B in buffalo. Twenty four, 20 month old buffalo heifers had CIDR{\textquoteright}s  inserted (day 0) for 12 days. Each heifer was injected intramuscularly  with 10 mg of oestradiol benzoate at CIDR insertion and 150 IU of PMSG  at CIDR removal. Two buffalo bulls fitted with chin ball harnesses were  introduced into each of 2 groups of 12 heifers. Continuous observations  of mating activity commenced 24 hours after CIDR withdrawal. The  heifers were bled for progesterone analysis on days -20, -9, 0, 2, 7, 12  and 26.9 CIDR{\textquoteright}s (38\%) lost from the heifers were replaced immediately  after the losses were noticed. The mean interval from CIDR removal to  onset of mating activity was 50.3},
	issn = {1176-5283},
	author = {Pleasants AB and Barton RA and Morris ST and Anderson WJ}
}
