@conference {40704,
	title = {Response of trace element concentrations in plasma of sheep to chronic infusion of a recombinant variant of IGF-1},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {55},
	year = {1995},
	month = {Jan},
	pages = {179-182},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Bio-ijmpedance (BI) is the opposition of biological tissues to the flow  of an alternating low electrical current. Tissue BI is quantitatively inversely  related with tissue hydrational status.   Several reproductive events of importance in the management of the cow are  characterised by changes in fluid content and electrolyte concentration of the  genital tissues; these changes can be detected and quantified by genital tissue  BI monitoring.   The objective of this presentation is to review existing and potential  applications of monitoring genital tissue BI in cows as aids to cattle  reproductive management.   The main application is genital BI monitoring to determine the optimal  insemination time. It is based on the fact that intravaginal and vulvar tissue  BI decline ca 10-30\% during the peri-ovulatory stage of the ovarian  cycle. Genital BI measurements can also be used to detect pending calving  as well as post partum reproductive disorders: vulvar BI, measured  with chronically implanted electrodes, declines ca 15 d before, and  remains low until calving. During ca 40d post-calving, vulvar BI  increases gradually and stabilises at about the time of resumption of ovarian  luteal cyclicity.   Intravaginal BI during the first 4-6 weeks post-calving is significantly lower  in cows with reproductive disorders than in },
	issn = {1176-5283},
	author = {Lee J and Rounce JR and Hocking-Edwards JE and Harris PM}
}
