Relationship between plasma and faecal progesterone in gilts
2004
Padet Tummaruk(Chulalongkorn University, Bangkok (Thailand). Faculty of Veterinary Sciences. Department of Obstetrics, Gynaecology and Reproduction) | Junpen Suwimonteerabutr(Chulalongkorn University, Bangkok (Thailand). Faculty of Veterinary Sciences. Department of Obstetrics, Gynaecology and Reproduction) | Jinda Singlor(Chulalongkorn University, Bangkok (Thailand). Faculty of Veterinary Sciences. Department of Obstetrics, Gynaecology and Reproduction) | Wichai Tantasuparuk(Chulalongkorn University, Bangkok (Thailand). Faculty of Veterinary Sciences. Department of Obstetrics, Gynaecology and Reproduction) | Mongkol Techakumphu(Chulalongkorn University, Bangkok (Thailand). Faculty of Veterinary Sciences. Department of Obstetrics, Gynaecology and Reproduction) | Annop Kunavongkrit(Chulalongkorn University, Bangkok (Thailand). Faculty of Veterinary Sciences. Department of Obstetrics, Gynaecology and Reproduction)
Present study was performed to investigate the relationship between the levels of plasma and faecal progesterone (P sub(4)) metabolite during a normal oestrous cycle in gilts. Five crossbred gilts were used for the study. Feces and blood were collected every 3 days starting from the first day of standing oestrus (day 1) until day 19. P sub(4) metabolite in the feces was extracted using phosphate buffer solution. The measurement of P sub(4) levels in plasma and feces were carried out using solid-phase 125I-radioimmunoassay and its correlation was calculated by Spearmans correlation. It showed that the means faecal P sub(4) metabolite concentration on days 1, 4, 7, 10, 13, 16 and 19 of the oestrous cycle were 9.6, 17.9, 63.0, 255.6, 1006.6, 300.0 and 71.7 pmol/g, respectively. The levels of Psub4 in plasma collected at the same time as the feces were 1.9, 44.0, 78.5, 131.0, 88.5, 20.4 and 0.8 nmol/l, respectively. Variations in the levels of P sub(4) metabolite in the feces as well as P sub(4) in the plasma were relatively high among the gilts. On average, faecal P sub(4) metabolite was lowest on day 1 and highest on day 13 and plasma 14 was lowest on day 19 and highest on day 10 of oestrous cycle. The levels of plasma and faecal P sub(4) metabolite were significantly correlated (r=0.55, p LT 0.001). It was concluded that P sub(4) metabolite in the feces of gilts con be measured in place of plasma P sub(4), as it is significantly correlated to the level in plasma.
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