Resumen

RIVAS, FR; GONZALEZ, MA; MATILLER, V  y  WILLIAMS, SI. Altrenogest en cerdas primíparas: efecto sobre la aparición de celo y el tamaño de la camada. FAVE, Secc. Cienc. vet. [online]. 2019, vol.18, n.2, pp.36-39. ISSN 2362-5589.

The objective of this study was to evaluate the effect of Altrenogest administration on estrus manifestation and litter size of primiparous sows. Seventy-two primiparous sows (Landrace x Yorkshire) with a weight of 155 ± 5 kg were randomly assigned to two groups: 1) GT or treatment group (n=36) that received Altrenogest administration during 18 days (20 mg./day) in the food and 2) GC or control group (n=36). Estrus manifestation was recorded as well as number of piglets born alive, stillborn and litter size. ANOVA was used for mean comparisons using INFOSTAT statistical software. No differences between treatments were observed for number of stillborn and litter size whereas number of piglets born alive was increased by Altrenogest administration (p<0.05). Estrus manifestation was observed between fourth and sixth day following Altrenogest treatment. We can conclude that the treatment of Altrenogest in primiparous sows improved the number of piglets born alive and synchronized estrus.

Palabras clave : Progestagen; Oestrus synchronization; Reproduction.

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