Welfare and pregnancy rate of ewes undergoing transcervical artificial insemination with ketamine subarachnoid anesthesia

Carneiro, Renata P.B.; Macedo, Gustavo Guerino; DeRossi, Rafael; Silva, Eliane Vianna da Costa e; Souza, María Inés Lênz

doi:10.1007/s11250-019-01805-5

Trop Anim Health Prod

2019

DOI: 10.1007/s11250-019-01805-5

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Welfare and pregnancy rate of ewes undergoing transcervical artificial insemination with ketamine subarachnoid anesthesia

Renata P.B. Carneiro

Gustavo Guerino Macedo

Rafael DeRossi

et al.

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“…Similarly, in sheep, Gibbons et al (2019) reported 50%-70% pregnancy rate with fresh semen via all routes of artificial insemination and 45% with intrauterine frozen-thawed semen. Third, the higher costs, time taken and the specialized equipment needed, in addition to animal welfare implications for laparoscopic intrauterine AI (Jamadi et al, 2017;Carneiro et al, 2019) limit the use of this technique in goats despite the greater reproductive success compared with the cervical route.…”

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The use of oxytocin to cause cervical dilation for transcervical insemination in nulliparous goats: Improving pregnancy and kidding rates

Gutierrez

Sánchez-Dávila

Ledezma-Torres

et al. 2022

Reprod Domestic Animals

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To evaluate the effect of oxytocin as a cervical dilator, a study was carried out on nulliparous goats inseminated transcervically at the beginning of the breeding season. One hundred sixteen nulliparous goats with a mean live weight of 33.4 ± 0.68 kg and an age of 13.7 ± 0.37 months were used. The goats were exposed to active bucks of proven fertility for a period of 14 d in order to induce oestrus. One week later, the Ovsynch protocol was applied, which consisted of the application of 20 mg of gonadorelin (Day Zero), 0.075 mg of cloprostenol (Day 7) and of a second dose of 20 mg of gonadorelin applied on Day 9. Artificial insemination (AI) was performed 16 hr later. Three treatments were evaluated: T1 = 50 IU saline, T2 = 25 IU oxytocin; T3 = 50 IU of oxytocin, intravenously applied 10–15 min before AI. The time required to inseminate each treated goat from groups T2 and T3 was 49.56 and 56.25 s, respectively, versus 85.78 s needed for the goats from group T1 (p < .0001). In the T1 group of goats, the insemination catheter was inserted 2.1 cm into the cervical canal and in goats from groups T2 and T3 it reached 3.41 and 3.77 cm into the cervical canal, respectively (p = .02). Pregnancy rates and prolificacy (kids/doe) were higher (p = .02) for groups T2 (82.93%; 1.16) and T3 (76.92%; 1.21) respectively than for control goats (61.11%; 0.69). In conclusion, the intravenous administration of oxytocin led to greater dilation and depth of cervical penetration, obtaining higher pregnancy rates and prolificacy.

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mentioning

confidence: 99%

The use of oxytocin to cause cervical dilation for transcervical insemination in nulliparous goats: Improving pregnancy and kidding rates

Gutierrez

Sánchez-Dávila

Ledezma-Torres

et al. 2022

Reprod Domestic Animals

View full text Add to dashboard Cite

show abstract

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Welfare and pregnancy rate of ewes undergoing transcervical artificial insemination with ketamine subarachnoid anesthesia

Cited by 1 publication

References 31 publications

The use of oxytocin to cause cervical dilation for transcervical insemination in nulliparous goats: Improving pregnancy and kidding rates

The use of oxytocin to cause cervical dilation for transcervical insemination in nulliparous goats: Improving pregnancy and kidding rates

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