Plasma progesterone in alpaca (Lama pacos) during pregnancy, parturition and early postpartum |
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Authors: | Raggi L A Ferrando G Parraguez V H MacNiven V Urquieta B |
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Institution: | Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago. lraggi@abello.dic.uchile.cl |
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Abstract: | Plasma progesterone concentration during pregnancy and the early postpartum period was measured by radioimmunoassay in five alpacas (Lama pacos), of the Huacaya breed, whose pregnancy length had a mean of 344.8 +/- 4.4 days. Concentration of progesterone increased (P < 0.001) from low premating values (0.11 +/- 0.06 nmol/l) to greater values at 30 days of pregnancy (8.05 +/- 1.13 nmol/l) and remained high up to 2 months of pregnancy. A slight transitory decline was observed between 3 to 7 months. Concentration of plasma progesterone dropped markedly during the 72 h before parturition especially, at the day of parturition. |
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