Original scientific paper

Changes of progesterone concentrations in blood plasma of sows during periparturient period.

Darko Gereš ; Obstetrics and Reproduction Department, Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia
Damir Žubčić ; Dre`nik Private Veterinary Clinic, Karlovac, Croatia
Davor Sabo ; Sljeme d.d. Pig Farm, Sesvete, Croatia
Andrija Pleli ; Sljeme d.d. Pig Farm, Sesvete, Croatia
Petar Džaja ; Department of Forensic Veterinary Medicine, Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia
Damir Mihelić ; Department of Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia
Gjorgje Müller ; Veterinary Clinic of Rab, Rab, Croatia

Abstract

Changes of progesterone level in a total of 40 parturient sows were investigated from the fourth to the second day prior to 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 50.1 nmol/l, with a mean value of 18.14 nmol/l. At parturition (phase B) the level of progesterone ranged between 1.1 and 27.4 nmol/l (6.09 nmol/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).

Keywords

progesterone; gilt, sow; periparturient; parturition; parturient

Hrčak ID:

95812

URI

https://hrcak.srce.hr/95812

Publication date:

19.2.2000.

Article data in other languages: croatian

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