Fixed-time post-cervical artificial insemination in sows receiving porcine luteinising hormone at oestrus onset

Fontana, Diogo Luiz; Ulguim, Rafael da Rosa; Sbardella, Pedro Ernesto; Bernardi, Mari Lourdes; Wentz, Ivo; Bortolozzo, Fernando Pandolfo

doi:10.1016/j.anireprosci.2013.12.003

Cited by 26 publications

(32 citation statements)

References 23 publications

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“…Unexpectedly, the greater dose (5 mg) used in gilts of the present study did not advance their ovulation, corroborating recent results in weaned sows (Fontana et al. ). Therefore, when applied at the onset of oestrus by the intramuscular route, pLH seems no to be effective for advancement of ovulation, probably because part of it undergoes systemic metabolization before reaching the site of action.…”

Section: Discussionsupporting

confidence: 92%

“…; Fontana et al. ). It can be postulated that the reduction in total piglets born could be related to the insemination being performed outside the optimal interval in some gilts.…”

Section: Discussionmentioning

confidence: 97%

“…Furthermore, 12.9% of gilts were inseminated 24–32 h before ovulation, which is an interval also known to give quite good fertilization results (Kemp and Soede ; Fontana et al. ). If a single insemination at 16 h after the onset of oestrus had been used in the control group, 74.5% of the gilts would have been inseminated at 0–24 h and 11.8% at 24–32 h before ovulation.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Use of Porcine Luteinizing Hormone at Oestrous Onset in a Protocol for Fixed‐Time Artificial Insemination in Gilts

Ulguim

Fontana

Rampi

et al. 2014

Reprod Domestic Animals

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The aim of this study was to evaluate the effect of porcine luteinizing hormone (pLH) given at oestrous onset in gilts, by different routes and doses, on the interval between onset of oestrus and ovulation (IOEO) and reproductive performance using a single fixed-time artificial insemination (FTAI). A total of 153 gilts were submitted to oestrous detection at 8-h intervals and assigned to three groups: control - without hormone application and inseminated at 0, 24 and 48 h after oestrous onset; VS2.5FTAI - 2.5 mg pLH by the vulvar submucosal route at oestrous onset and a single FTAI 16 h later; IM5FTAI - 5 mg pLH by the intramuscular route at oestrous onset and a single FTAI 16 h later. More VS2.5FTAI gilts (47.1%; p < 0.05) ovulated within 24 h after oestrous onset than control gilts (25.5%) whereas IM5FTAI gilts had an intermediate percentage (31.4%; p > 0.05). The IOEO tended to be shorter (p = 0.06) in VS2.5FTAI (30.2 ± 1.4 h) than in control (34.7 ± 1.4 h) gilts, but there was no difference (p > 0.05) between control and IM5FTAI (32.8 ± 1.4 h) gilts. Farrowing rate was not different (p > 0.05) among treatments. Total born piglets (TB) was lower (p < 0.05) in VS2.5FTAI (12.3 ± 0.4) than in control gilts (14.1 ± 0.4), whereas intermediate TB was observed in IM5FTAI gilts (13.3 ± 0.4). Due to the advancement of ovulation, reduction of the hormonal dose and the ease of application, the vulvar submucosal route would be the best option for FTAI protocols, but their negative impact on litter size remains to be elucidated. Taking into account the good fertility results obtained in IM5FTAI gilts whose ovulation was not advanced, the possibility of a single FTAI without any hormonal treatment should be further investigated, to establish reliable FTAI protocols for gilts.

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Section: Discussionsupporting

confidence: 92%

“…; Fontana et al. ). It can be postulated that the reduction in total piglets born could be related to the insemination being performed outside the optimal interval in some gilts.…”

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Use of Porcine Luteinizing Hormone at Oestrous Onset in a Protocol for Fixed‐Time Artificial Insemination in Gilts

Ulguim

Fontana

Rampi

et al. 2014

Reprod Domestic Animals

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“…Nevertheless, even in PCAI‐inseminated sows, the occurrence of semen backflow during insemination was reported in approximately one‐quarter of multiparous (Fontana et al. ) and primiparous (Sbardella et al. ) sows, raising the question of the importance of the boar presence during insemination having a favourable effect on semen transport in female reproductive tract.…”

Section: Artificial Insemination Techniquesmentioning

confidence: 99%

“…Therefore, protocols considering the oestrus onset as the timing for a single injection of an ovulation inducer have been applied in weaned sows (Zak et al 2010;Wongkaweewit et al 2012). The substances used to control the timing of ovulation include hCG, GnRH (or analogue) (Wongkaweewit et al 2012) and pLH (Zak et al 2010;Fontana et al 2014).…”

Section: Fixed-time Artificial Inseminationmentioning

confidence: 99%

New Artificial Insemination Technologies for Swine

Bortolozzo

Menegat

Mellagi

et al. 2015

Reprod Domestic Animals

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Contents Better efficiency in swine artificial insemination (AI) is accomplished by reducing the necessary number of sperm cells and achieving high reproductive performance. Some strategies have been developed for use under field conditions, such as the site of sperm deposition (post‐cervical AI), a single AI with control of oestrus and ovulation (fixed‐time AI), and the better use of high genetic merit boars, to spread their genes as much as possible. To apply these technologies, it is important to understand some anatomical limits, physiological aspects and farm requirements. In this review, we point out some strategies to achieve higher efficiency on the use of sperm for AI technology application in swine species.

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Update on artificial insemination: Semen, techniques, and sow fertility

Mellagi

Will

Quirino

et al. 2022

Molecular Reproduction Devel

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Over the years, reproductive efficiency in the swine industry has focused on reducing the sperm cell number required per sow. Recent advances have included the identification of subfertile boars, new studies in extended semen quality control, new catheters and cannulas for intrauterine artificial insemination (AI), and fixed‐time AI under commercial use. Therefore, it is essential to link field demands with scientific studies. In this review, we intend to discuss the current status of porcine AI, pointing out challenges and opportunities to improve reproductive efficiency.

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Fixed-time post-cervical artificial insemination in sows receiving porcine luteinising hormone at oestrus onset

Cited by 26 publications

References 23 publications

Use of Porcine Luteinizing Hormone at Oestrous Onset in a Protocol for Fixed‐Time Artificial Insemination in Gilts

Use of Porcine Luteinizing Hormone at Oestrous Onset in a Protocol for Fixed‐Time Artificial Insemination in Gilts

New Artificial Insemination Technologies for Swine

Update on artificial insemination: Semen, techniques, and sow fertility

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