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Levels as indicators insulin and glucose efficiency productive and reproductive in pospartum cows

Abstract:

The aim of this study was to determine plasma concentrations of glucose and insulin in bovine females, at 15, 30, 45 and 90 days postpartum relating it to body condition, milk production and calving first heat period. 40 Holstein Friesian cows, randomly distributed in five herds located in the canton Loja, Ecuador were studied; Taking blood samples after milking, with fasting, at 15, 30 and 45 days post partum; average glucose levels were determined: 47.90; 47.09 and 46.43 mg/dl; and insulin: 5.54; 5.05 and 5.28 uU/ml, respectively, concluding that blood levels of glucose and insulin levels are low postpartum and high glucose levels and low insulin concentrations are characteristic of the interval from calving to estrus between 46 and 90 days because the mammary gland uses glucose as an energy source for synthesis of lactose, varying according to the number of birth, being higher in cows with five and six births; It is high insulin levels in cows with three and four deliveries. However, high levels of glucose and insulin concentrations are low range characteristic parturition-estrus between 46 and 90 days since the low concentrations of insulin to glucose bkp_redirect to the mammary gland. This work confirms that CC childbirth is a factor in the resumption of ovarian activity and influence insulin secretion of GnRH, LH and FSH, which act directly on the ovary influencing sensitivity to gonadotropins.