Actividad ovárica postparto de cabras Alpinas consumiendo diferentes niveles de energía

Abstract

34 Alpine goats were used with the objective of evaluating the effect of energy density in the diet, on the return to postpartum ovarian activity. Three experimental groups were formed: E80: 80% of the postpartum energy requirements, E100: 100% of the requirements and E120: 120% of the requirements. The diet was provided 3 weeks before and up to 60 days after delivery. Female weight was determined every five days and the ovaries were scanned by ultrasonography twice a week to assess follicular growth. The day the females ovulated was determined by radioimmunoassay, based on the progesterone concentration. The goats in E120, observed higher weights than in E80 and E100 (P≤0.05). In E100 the first follicle presented earlier (27.09 ± 08.5 days; P≤0.05) and presented the highest percentage of ovulation (54.54%). There were no differences in the calving-ovulation interval between E100 and E120 (P <0.05). The level of energy consumption in the diet stimulates postpartum ovarian activity; however, a low percentage of animals ovulate, which may indicate that there are other factors that can condition the complete recovery of the ovary, such as suckling.