Ovulation rate, prolificacy and pregnancy rate in goats treated with oral glycerol

Main Article Content

Ubaldo Aguilar
Joel Hernández-Cerón
Yesmín Domínguez
Carlos Gutiérrez

Abstract

Veterinaria México OA
ISSN: 2448-6760

Cite this as:

  • Aguilar U, Hernández Cerón J, Domínguez Y, Gutiérrez C. Ovulation rate, prolificacy and pregnancy rate in goats treated with oral glycerol. Veterinaria México OA. 2016;3(1). doi: 10.21753/vmoa.3.1.360

This study tested whether the oral administration of glycerol at the time of progestin removal and in the first 6 days of the estrous cycle increased the ovulation rate, prolificacy, and pregnancy rate in goats. Intravaginal sponges impregnated with fluorogestone acetate were inserted into 129 goats for 12 days; upon sponge removal, goats were randomly assigned to one of the two following treatment groups: the glycerol group (n = 65), which received an oral drench of 100 mL of glycerol upon sponge removal and was repeated on days 0, 2, 4, and 6 following estrus (estrus = day 0), and the control group (n = 64), which did not receive glycerol. The goats in estrus were mated, and their ovulation rate was determined by ultrasonography between days 8 and 12 of the estrous cycle. Pregnancy was diagnosed by ultrasonography on day 40, and the prolificacy was determined at birth. In 6 goats treated with glycerol and 5 controls, their insulin concentrations at 0, 2, 4, 8, and 12 h after the glycerol drench were determined by radioimmunoassay. The proportion of goats with multiple ovulations (glycerol = 71 vs control = 64) and the proportion of goats with multiple births (glycerol = 52 vs control = 56) were similar (P > 0.05) between treatments. Likewise, the pregnancy rate was similar (P > 0.05) between treatments (glycerol = 88 vs control = 85%). The insulin concentrations tended to be higher in goats treated with glycerol (P = 0.08). In conclusion, an oral drench of 100 mL of glycerol at the time of progestin withdrawal and in the first 6 days of the estrous cycle did not increase the ovulation rate, prolificacy, or pregnancy rate in goats.

Figure 1. A schematic overview of the treatments.
Keywords:
Ovulation rate Prolificacy Glycerol Insulin Goats

Article Details

Author Biographies

Ubaldo Aguilar, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México

Candidato a Doctor. Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México

Joel Hernández-Cerón, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México

Profesor de la Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México

Carlos Gutiérrez, Facultad de Medicina Veterinaria y Zootecnia Universidad Nacional Autónoma de México

Profesor de la Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México

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