Efecto del estímulo físico de la cánula de inseminación sobre la inducción de la ovulación en coneja

Abstract

In induced ovulating does, the main factor responsible for ovulation induction is the genital somatosensory stimuli during the copulation. In camelids, ovulation induction requires multiple ejaculatory series and the seminal plasma contains a protein, the β-NGF, with a potent ovulatory effect. Although this protein has been identified in seminal plasma of rabbit, the physical stimulation of the genital tract during the artificial insemination seems to be the main factor in the induction of ovulation because the rabbit doe requires minimal copulatory stimulation and ovulation can be induced rapidly. The aim of this work was to study the physical stimulation of both types of insemination cannula (short and flexible compared to long and rigid), on ovulation induction and reproductive performance in rabbit doe. The results obtained in this study demonstrate that the type of insemination cannula used affects the ovulation induction of the female. The short cannula obtained significantly higher ovulation induction (0.64 ± 0.080) than the long one (0.30 ± 0.068), so it seems that the first mimics better the stimulation associated with the mating of the male to provoke the ovulation induction. However, when does are inseminated with these two types of cannulas containing the hormone in the semen extender, no differences in fertility nor prolificacy are found between them. This could be due to the use of the analog of GnRH in insemination which masks the effect of the type of cannula used.