RELATIONSHIPS BETWEEN INTRA-VAGINAL ELECTRICAL IMPEDANCE, ESTRUS BEHAVIOR, PLASMA LEVELS OF OVARIAN STEROIDS AND THE PRE-OVULATORY LUTEINIZING HORMONE SURGE IN THE PREDICTION OF THE OPTIMAL INSEMINATION TIME IN NORMAL CYCLING PIGS

Article Id: ARCC427 | Page : 114 - 120
Citation :- RELATIONSHIPS BETWEEN INTRA-VAGINAL ELECTRICAL IMPEDANCE, ESTRUS BEHAVIOR, PLASMA LEVELS OF OVARIAN STEROIDS AND THE PRE-OVULATORY LUTEINIZING HORMONE SURGE IN THE PREDICTION OF THE OPTIMAL INSEMINATION TIME IN NORMAL CYCLING PIGS.Indian Journal Of Animal Research.2012.(46):114 - 120
Tefera Yilma and Axel Sobiraj1
Address : Department of Clinical Studies, School of Veterinary Medicine, Addis Ababa University, Debre Zeit, Ethiopia

Abstract

A study aimed at determining the relationships between intravaginal electrical impedance (IEI), estrus behavior, plasma concentrations of reproductive hormones (progesterone, estradiol-17b and luteinizing hormone) in prediction of the optimal insemination time was conducted in sixteen normal cycling pigs. Measuring of intravaginal electrical impedance (IEI) was carried out throughout the estrous cycle using a 2-electrode impedance-measuring instrument. Blood samples were collected along side with measuring of IEI to determine plasma concentrations of reproductive hormones using radioimmunoassay. High values of impedance measured during the diestrus period, and low values of IEI coincided with the pre-ovulatory LH-peak at the height of standing heat. Fluctuations in the values of IEI were significantly correlated with changes in plasma LH (r = -0. 61) (P

Keywords

Estrus detection Impedance Luteinizing hormone Ovarian steroids Ovulation Pig.

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