engleski

Changes of progesterone concentrations in bood plasma of sows during periparturient period

Changes of progesterone level in a total of 40 parturient sows were investigated grom the fourth to the second day prior to parturition (phase A) at parturition (phase B) and on the second day post-parturition (phase A) at parturition (phase B) and on the second day post parturition (phase c). Venepuncture was performed on the vena cava cranialis by means of a needle and a syringe. Blood samples were collected in test tubes containing heparin.The radioimmunoassay method of direct quantitative measurement of the progesterone level in plasma was applied. Concentrations of progesterone in phase A ranged between 0.2 and 50.l nmol/l, with a mean value of l8.14 nmol/l. At parturition (phase B) the level of progesterone ranged between 1.l and 27.4. nmol/l (6.09.noml/l) and in phase C the mean level of progesterone was 2.68 nmol/l (0.6-8.1 nmol/l). Results of measurements showed a drop in blood plasma concentrations. Lowest values were recorded on the second day post parturition, which led to the conclusion that progesterone levels display a constant downward trend from the fourth day prior to parturition until the second day postparturition. The greatest differences were observed during the pre-parturition period, whereas only two days into parturition they were statistically negligible (standard deviation 1.61).

progestoreone; gilt; periparturient; parturition; parturient

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