Publications of Jérôme Ponthier
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See detailCase Report: Suppression of Harem Stallion Behavior and Fertility Following Anti-Gonadotropin-Releasing Hormone Vaccination of a Captive Wild Przewalski's Horse (Equus ferus przewalskii)
Ponthier, Jérôme ULiege; Rigaux, Goulven; Parrilla Hernandez, Sonia ULiege et al

in Frontiers in Veterinary Science (2020), 7

This report describes an option to modulate the testicular function of wild horses and field methods to assess it. Non-surgical castration of a captive wild Przewalski’s stallion with anti-gonadotropin ... [more ▼]

This report describes an option to modulate the testicular function of wild horses and field methods to assess it. Non-surgical castration of a captive wild Przewalski’s stallion with anti-gonadotropin-releasing hormone (GnRH) immunization was performed by sub-cutaneous injection of two doses of 450 μg (3 ml) of GnRH conjugated to diphtheria toxin, further repeated every 6 months. Semen quality was assessed after collection by electro-ejaculation under general anesthesia. Endocrine and behavioral consequences were studied during a 2-year follow-up period. The procedure of electro-ejaculation was safe and effective to collect spermatozoa. Motility was low but was improved by a significant dilution of sample (1v/4v−1v/5v) after collection. Immuno-neutering resulted in a decrease of the total spermatozoa number and motility 1 month after primary vaccination. However, infertility could not yet be guaranteed. Six months post-vaccination, serum testosterone concentrations had decreased and the treated stallion had lost his harem stallion role. Moreover, at the same time, the total spermatozoa number was near zero with no motile spermatozoa, and offspring was no longer observed. As a conclusion, electro-ejaculation under general anesthesia is suitable on wild horses to obtain spermatozoa that should be washed or largely diluted before use for artificial insemination (AI) programs. Anti-GnRH immuno-neutering protocol led to a dramatic decrease of spermatozoa number, motility, and testosterone production. This also induced deep changes in the social structure of the band. Such technique could be considered as an alternative to surgical castration in wild horses. [less ▲]

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See detailEndoscopy Guided Photoablation of Endometrial Cysts using a 980 nm Laser with a Contact Fiber in Mares
Ponthier, Jérôme ULiege; de la Rebière de Pouyade, Geoffroy ULiege; Salciccia, Alexandra ULiege et al

in Journal of Visualized Experiments (2020)

In mares, endometrial cysts are associated with endometriosis and can cause maternal recognition failure or compromise and delay pregnancy diagnoses. Historical treatments were invasive and had adverse ... [more ▼]

In mares, endometrial cysts are associated with endometriosis and can cause maternal recognition failure or compromise and delay pregnancy diagnoses. Historical treatments were invasive and had adverse effects on the endometrium. Hysteroscopically guided laser therapy is easy and effective for endometrial cysts resection, with no deleterious effects for the endometrium. A 110 cm long and 1.0 cm wide endoscope is sterilely introduced in the uterus through the open cervix of an estrous mare after vulvar cleaning. The uterus is slowly infused with less than 1 L of physiologic solution and the laser fiber is inserted in the biopsy canal of the endoscope. Cysts are then cauterized with the 980 nm diode laser with a contact fiber set at 20‒2 5W in continuous mode. Each cyst is punctured until complete voiding of the cyst and shrinking of the cyst wall around the fiber. Uterine lavages with sterile saline solution are performed directly after the surgery and for one or two days as non-inflammatory fluid can be observed. This procedure is easy and quickly performed, with no obvious deleterious effects. Cysts resection makes ultrasound pregnancy diagnosis easier and, in some cases, could restore proper embryo migration in the uterine horns between day 6.5 and 17. However, this treatment does not improve the underlying histological lesions related to endometriosis. These considerations should be clearly expressed to the breeder before this procedure. [less ▲]

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See detailProceedings of the 7th FARAH-Day
Bayrou, Calixte ULiege; Cesarini Latorre, Carlota ULiege; Delguste, Catherine ULiege et al

Book published by Presses de la Faculté de Médecine vétérinaire de l'Université de Liège (2020)

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See detailInadequate mare-foal bonding restored by adoption of her own foal - a case report
Parrilla Hernandez, Sonia ULiege; Deleuze, Stefan ULiege; Wimmer-Scherr, Christina ULiege et al

Poster (2019, September 21)

Difficulties in mare-foal bonding are mostly the consequence of an abnormal maternal behaviour. Despite current therapies usually based on restrain and sedation of the mare as well as adapted management ... [more ▼]

Difficulties in mare-foal bonding are mostly the consequence of an abnormal maternal behaviour. Despite current therapies usually based on restrain and sedation of the mare as well as adapted management of each situation, the mare-foal bonding is not always created. However, adoption of foster foals and establishment of the maternal behaviour is often successful. Procedures of adoption mimic the transient increase of oxytocin during delivery and its effects by cervical and vaginal stimulation (Fergusson reflex), or by pharmacological simulation of the high concentrations of prostaglandins observed during parturition. Even if the mechanism is not yet well understood in mares, both hormones seem to have a direct effect on the brain control of maternal behaviour. A primiparous 7 years old mare was presented at the Equine Clinic showing aggressive behaviour towards her 4 days filly especially when the foal attempted to suckle. No evident cause of pain at suckling was found. A hormonal adoption procedure of her own foal was implemented after several attempts to restore the mare-foal bonding by restrain and sedation of the mare. After 3h of fasting and isolation of the foal, the mare received an im injection of 750µg of cloprostenol. The foal was carefully presented to the mare when the secondary effects of the prostaglandins were visible. The mare accepted the foal and allowed suckling rapidly. During the next 24 hours under supervision, the mare showed a very normal maternal behaviour. After 3 days of normal bonding, mare and foal were discharged from the clinic. Adoption of filial foals could be a valuable option in the treatment to establish or restore the normal bonding between a mare and her own foal. [less ▲]

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See detailMaladies infectieuses en reproduction et néonatalogie équine: état des lieux en Belgique
Ponthier, Jérôme ULiege; Barrandeguy, Maria Edith

Conference (2019, May 14)

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See detailLes effets de l'exercice sur la fertilité chez l'étalon de sport
Ponthier, Jérôme ULiege

in Nouveau Praticien Vétérinaire Equine (2019), Hors-série(12), 147-151

Les résultats sportifs d’un étalon conditionnent les demandes pour des saillies ou des doses d’insémination. Malheureusement, l’entraînement et la compétition limite la disponibilité de l’étalon de sport ... [more ▼]

Les résultats sportifs d’un étalon conditionnent les demandes pour des saillies ou des doses d’insémination. Malheureusement, l’entraînement et la compétition limite la disponibilité de l’étalon de sport, diminuant sa prolificité au moment du démarrage de sa carrière reproductrice. Cette revue propose de revoir les effets du sport et de la température sur la physiologie et l’endocrinologie du testicule et ses conséquences sur la fertilité. [less ▲]

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See detailProceedings of the 6th FARAH-Day
Bayrou, Calixte ULiege; Delguste, Catherine ULiege; Douny, Caroline ULiege et al

Book published by Presses de la Faculté de Médecine vétérinaire de l’Université de Liège (2019)

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See detailOn-field Electro-ejaculation of Wild Prezwalski Horses: Results and Perspectives
Rigaux, Goulven; Parrilla Hernandez, Sonia ULiege; Egyptien, Sophie ULiege et al

in Journal of Equine Veterinary Science (2018), 66

hus, semen collected from wild horses by electro-ejaculation performed under anaesthesia could be shipped after large dilution to the lab and eventually used for AI programs, if CASA results show ... [more ▼]

hus, semen collected from wild horses by electro-ejaculation performed under anaesthesia could be shipped after large dilution to the lab and eventually used for AI programs, if CASA results show sufficient motility. [less ▲]

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See detailClinical case: Management of twins in mares
Ponthier, Jérôme ULiege

Scientific conference (2018, July 05)

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See detailHot topics session: Contraception in the equine
Ponthier, Jérôme ULiege

Scientific conference (2018, July 05)

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See detailEmbryo transfer in mares: Why? When? How?
Ponthier, Jérôme ULiege

Scientific conference (2018, July 04)

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See detailProceedings of the 5th FARAH-Day
Bayrou, Calixte ULiege; Cabaraux, Jean-François ULiege; Delguste, Catherine ULiege et al

Book published by Presse de la Faculté de Médecine Vétérinaire de l'Université de Liège (2018)

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See detailAborder la fertilité chez l'étalon et la jument
Ponthier, Jérôme ULiege; Deleuze, Stefan ULiege

Conference given outside the academic context (2017)

Cette conférence se propose de définir quels sont les facteurs de fertilité chez la jument comme chez l'étalon et d'étudier les pathologies ou mauvaises pratiques pouvant mener à de l'infertilité dans l ... [more ▼]

Cette conférence se propose de définir quels sont les facteurs de fertilité chez la jument comme chez l'étalon et d'étudier les pathologies ou mauvaises pratiques pouvant mener à de l'infertilité dans l'espèce équine. [less ▲]

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See detailProceedings of the 4th FARAH-Day
Bayrou, Calixte ULiege; Cabaraux, Jean-François ULiege; Delguste, Catherine ULiege et al

Book published by Presses de la Faculté de Médecine vétérinaire de l’Université de Liège (2017)

Detailed reference viewed: 61 (18 ULiège)
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See detailCase report: Ovarian fibroma in a mare – Hormonal considerations
Ponthier, Jérôme ULiege; Salciccia, Alexandra ULiege; Parrilla Hernandez, Sonia ULiege et al

in Reproduction in Domestic Animals (2016, October 27), 51(supplement 2), 132

This report shows that, as in humans, AMH as well as steroids productions are low in case of ovarian fibroma, thus preserving normal cyclicity.

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See detailClinical cases in equine reproduction
Ponthier, Jérôme ULiege

Scientific conference (2016, August 26)

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See detailSemen freezing in the stallion
Ponthier, Jérôme ULiege

Scientific conference (2016, August 26)

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See detailPathologies of the mammary gland of the mare
Ponthier, Jérôme ULiege

Scientific conference (2016, August 26)

Detailed reference viewed: 23 (1 ULiège)