A review of the effects of prostaglandins on sexual behavior in boars

Estienne, M. J.

doi:10.1016/j.applanim.2014.02.001

Cited by 7 publications

(7 citation statements)

References 28 publications

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“…To the best of our knowledge, the mechanisms and pathways by which the prostaglandin or its analogues enhance sexual behaviour have not been elucidated even in other more studied species. It has been speculated that in boars, analogues of PGF2 might induce an increase in testosterone secretion (Estienne & Harper, 2000), but the positive effects are observed also in castrated pigs (Zamora et al, 2010), so it appears as more probably a direct action at the central nervous system (Estienne, 2014). In this sense, Burne et al (2002) reported that dinoprost promotes the activity of neurons in several hypothalamic nuclei in pigs.…”

Section: Discussionmentioning

confidence: 99%

“…In general, the administration of cloprostenol increased semen volume and mass motility, whereas dinoprost had no effects on these variables. The mechanisms by which the administration of analogues of PGF2α might enhance semen collection have not been elucidated, but in one hand, Estienne (2014) proposed that analogues of PGF2α stimulate sexual motivation in boars and thus probably stimulated the ejaculatory process, based on its action in one or more areas of the central nervous system. A non‐opposed explanation is that PGF2α stimulates ejaculation as it triggers the contractility of the muscles of the genital tract involved in the process (Cosentino et al., 1984).…”

Section: Discussionmentioning

confidence: 99%

“…Analogues of PGF2α have been used in boars with positive results on sexual behaviour, but limited impact on semen quality (Estienne, 2014). Dinoprost tromethamine and D‐Cloprostenol are the two analogues most frequently used in boars, but doses of 10 mg of Dinoprost tromethamine—that are effective in boars—did not have positive effects on sexual behaviour of male rams (Ungerfeld et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

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Cloprostenol enhances sexual behaviour and semen quality in growing lambs more effectively than Dinoprost

Sánchez-Dávila

Hernández-Melo

Ledezma-Torres

et al. 2022

Reprod Domestic Animals

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Analogues of PGF2α have been used in boars with positive results on sexual behaviour, but limited impact on semen quality. The objective of this study was to determine whether the administration of Dinoprost tromethamine or D‐Cloprostenol enhances the sexual behaviour and semen quality of sexually inexperienced growing lambs during the onset of the breeding season. The study lasted 10 weeks, beginning during the non‐breeding season, with 24 sexually inexperienced Katahdin lambs (5.1 ± 0.5 months old). Three groups of eight lambs each received: (1) vehicle treatment (group CON); (2) 10 mg of Dinoprost tromethamine (group DIN); or (3) 0.15 mg of Cloprostenol dextrogy (group CLOP). The treatments were all applied im 5 min before the tests of sexual behaviour, or 20 min before the collection of semen. Sexual behaviour was evaluated twice weekly in a pen test with a non‐oestrous ewe, and semen was collected once weekly with an artificial vagina. The latency to begin courtship was significantly shorter in both groups that received analogues of PGF2α than in CON lambs. The number of ano‐genital sniffs, flehmens and lateral approaches was greater in both treated groups than in CON lambs (p < .05). Lambs from DIN group mounted significantly more than CLOP and CON lambs, which did not differ. However, CLOP lambs showed significantly greater mating efficiency (i.e. ejaculations/total mounts) than CON lambs, which exhibited significantly greater mating efficiency that DIN lambs. Lambs treated with CLOP produced significantly more semen volume with more mass motility than those treated with DIN and CON (without differences between DIN and CON). Overall, we concluded that the administration of cloprostenol or dinoprost before sexual evaluation in young rams enhances their sexual behaviour. Cloprostenol had greater effects than dinoprost. The administration of cloprostenol before semen collection also triggered the ejaculation of a greater volume of semen, with greater mass motility. These results open interesting possibilities to study deeply the use of simple and cost‐effective treatments to improve the reproductive results of young growing rams.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cloprostenol enhances sexual behaviour and semen quality in growing lambs more effectively than Dinoprost

Sánchez-Dávila

Hernández-Melo

Ledezma-Torres

et al. 2022

Reprod Domestic Animals

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“…Kondracki et al (2013) concluded that the boar sexual experience did not favor the intensity of manifestation of sexual behaviour, which is also a general conclusion of this study in relation to libido manifestation. For this reason, Estienne (2014) points out that prostaglandin administered by injection can enhance libido in older boars that show weaker sexual drive. The effect of daylight within photoperiod interval is in agreement with the research of Knecht et al (2013), in which a significant effect of photoperiod was determined on the variability of ejaculate volume.…”

Section: Discussionmentioning

confidence: 99%

Effect of photoperiod on sexual activity of boar

Savić

Petrović

2015

R. Bras. Zootec.

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-The main objective of this study was to assess the effect of photoperiod on sexual activity of three breeds of boars: Swedish Landrace (n=34), Large White (n=38), and Duroc (n=32). Boar sexual activity was analysed based on the libido index and intensity of ejaculation. The libido index was calculated as the ratio between the duration of ejaculation and time of preparation until ejaculation. The intensity of ejaculation was the volume of ejaculate (mL) secreted in the unit of time (min). The effect of photoperiod was analysed as the effect of duration of daylight (<12 h and >12 h) within photoperiod intervals (increasing and decreasing). Impact assessment was carried out by applying the General Linear Model procedure. Libido and intensity of ejaculation varied under the impact of photoperiod and the breed of boars. With the increase in age, the boar libido weakened, while the volume of ejaculate and intensity of ejaculation increased. Boars manifested better libido when the daylight lasted longer than 12 h in both photoperiod intervals. Different from libido, the volume of ejaculate and intensity of ejaculation were highest when the daylight was shorter than 12 h, but only in the decreasing photoperiod interval. Swedish Landrace boars manifested best libido, while in the production of sperm the Duroc boars were inferior compared with Swedish Landrace and Large White. The phenotypic relationship among libido, ejaculate volume, and ejaculation intensity ranges from very low to high; however, the coefficients were positive, which indicates the possibility of simultaneous improvement of these traits.

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“…Cloprostenol, a PGF2α analog, induces uterine contractions, nevertheless, causes no significant changes in any stage of the estrous cycle in cows [23]. Administration of PGF2α analogs immediately before semen collection enhanced libido of boars with known decreased sex drive [20,24] and reduced the time needed to train young boars for collecting semen and the number of false mounts in boars trained to the dummy mount [25]. Similarly, the administration of PGF2α to low libido bulls improved their libido [21].…”

Section: Introductionmentioning

confidence: 99%

Hastening Time to Ejaculation in Donkey Jacks Treated with the PGF2α Analog, Cloprostenol Sodium

Panzani

Quaresma

Fanelli

et al. 2020

Animals

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Due to the long courtship needed to attain excitation and erection, donkey semen collection can take up to 90 min. ProstaglandinF2α (PGF2α) has been reported to hasten the onset of erection and ejaculation in domesticated mammals, presumably by inducing smooth muscle contractions in the internal genitalia. However, while it has been anecdotally used in donkeys, it has yet to be critically evaluated. This study aimed to compare behavioral and semen parameters in Catalan, Balearic, Amiata, and Miranda jacks treated with the PGF2α analogue cloprostenol sodium immediately prior to exposure to an estrus jenny. Nineteen donkeys were assigned in a crossover design to receive cloprostenol sodium (125 µg, i.m.; n = 53 collections) or saline (1 mL, i.m.; n = 53 collections). There were no differences for erection (52/53 vs. 52/53) or ejaculation (52/53 vs. 48/53) for collection attempts assigned to saline or cloprostenol sodium, respectively. Cloprostenol sodium significantly hastened treatment-to-erection and treatment-to-ejaculation times from 12.0 ± 1.6 to 6.0 ± 1.6 min and from 14.0 ± 1.4 to 9.6 ± 1.4 min, respectively. Significant effects of breed and age were observed in behavioral and parameters, but there were no effects of cloprostenol sodium administration on semen parameters. In conclusion, cloprostenol sodium administration immediately prior to semen collection hastened time to collect semen in donkeys with no detrimental effects on semen quality and can be used by practitioners to circumvent long delays in donkey semen collection.

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A review of the effects of prostaglandins on sexual behavior in boars

Cited by 7 publications

References 28 publications

Cloprostenol enhances sexual behaviour and semen quality in growing lambs more effectively than Dinoprost

Cloprostenol enhances sexual behaviour and semen quality in growing lambs more effectively than Dinoprost

Effect of photoperiod on sexual activity of boar

Hastening Time to Ejaculation in Donkey Jacks Treated with the PGF2α Analog, Cloprostenol Sodium

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