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Advisor(s)
Abstract(s)
The success of artificial insemination (AI) depends on the equipment used, especially regarding the facilitation of artificial
insemination technicians’ work and the positioning of insemination guns in the genital tract of animals. This study aimed to
evaluate how vaginal specula and artificial insemination technicians affected the fertility rates of timed artificially inseminated
Serrana Transmontano goats (which are indigenous to Portugal). For this, 58 adult nanny-goats aged between three and
nine years were used. They were reproductively controlled by a short progestogen treatment (FGA) (seven days) with equine
chorionic gonadotropin (eCG). Timed cervical AI (43 hours after the end of the hormonal treatment) was performed with
chilled semen. Nanny-goats were inseminated by two artificial insemination technicians (A vs. B) alternating two vaginal
specula (Minitub vs. “Reyes”). Pregnancy was diagnosed by ultrasound 41 days later. About 98% of nanny-goats responded
to our treatment with FGA and eCG. In total, 82.8% of nanny-goats were pregnant 41 days after AI. Neither vaginal specula
(Minitub: 81.2% vs. “Reyes”: 84.6%) nor artificial insemination technicians (A: 82.8% vs. B: 82.8%) affected fertility rates.
Thus, we conclude that neither the vaginal specula used in this research nor the artificial insemination technicians affected
Serrana goat pregnancy rates.
Description
Keywords
Goat farming Reproduction Fertility rates
Citation
Quintas, Helder; Silva, Daiane; Afonso, Paulo; Álvaro, Armindo; Mateus, Óscar; Valentim, Ramiro (2023). Timed artificial insemination in Serrana nanny-goats: the effects of vaginal specula and artificial insemination technicians. Revista Agrogeoambiental. ISSN 1984-428X. 15, p. 1-8