Induction and synchronization of ovulations of nulliparous and multiparous sows with an injection of gonadotropin-releasing hormone agonist (Receptal)

Martinat-Botté, F.; Venturi, Éric; Guillouet, Philippe; Driancourt, Marc Antoine; Terqui, M.

doi:10.1016/j.theriogenology.2009.09.017

Cited by 56 publications

(75 citation statements)

References 17 publications

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“…According to Brüssow and Wähner [35], PMSG is the only agent that can stimulate sufficient ovulatory follicles to produce large viable litters. However, do Lago et al [36] and Martinat-Botté et al [3] found that PMSG treatment increased the ovulation rate, but also had a negative influence on embryonic viability, probably because it increased follicular heterogeneity in the preovulatory pool and caused the asynchronous development of embryos [37,38].…”

Section: Paritymentioning

confidence: 98%

“…It has also been shown to improve the synchronization of estrus onset within batches [1,3,4]. In addition, gonadotropins have been used to decrease the weaning-to-estrus interval (WEI), which proved to be particularly helpful in sows that were at a high risk of reduced fertility during the post-weaning period, such as first parity sows [5] or animals experiencing seasonal infertility problems [6].…”

Section: Introductionmentioning

confidence: 99%

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Effect of a GnRH analogue (Maprelin) on the reproductive performance of gilts and sows

Jong

Kauffold²,

Engl³

et al. 2013

Theriogenology

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a b s t r a c tThe ability of peforelin (l-GnRH-III) to stimulate follicular growth, FSH release, and estrus in gilts after altrenogest treatment and in sows after weaning was investigated. In three farrow-to-wean herds, with at least 600 sows and average production performance, 216 gilts, 335 primiparous, and 1299 pluriparous sows were randomly allocated to three treatments: peforelin (M group: Maprelin), eCG (F group: Folligon), and physiological saline solution (C group). Animals were treated 48 hours after their last altrenogest treatment (gilts) or 24 hours after weaning (sows). The weaning-to-estrus interval, estrus duration, estrus rate (ER), pregnancy rate, and total born (TB), live born, and stillborn (SB) numbers were recorded and compared between treatments for the different parity groups (gilts and primiparous and pluriparous sows). Follicle sizes were measured in representative animals from each group on the occasion of their last altrenogest treatment or at weaning, and also on the occasions of their first (FS1) and second (FS2) attempted inseminations. Blood samples were taken to determine FSH concentrations at weaning and 2 hours after injection, and progesterone concentrations 10 days after the first insemination attempt. The relative change in FSH concentrations was calculated. Significant differences were found for ER within 7 days of weaning in pluriparous sows (95%, 91%, and 90% for the M, F, and C groups, respectively, P ¼ 0.005). Gilts in the F-group had high TB numbers, and pluriparous sows in the M group had high SB numbers (TB gilts ¼ 13.6, 15.4, and 14.9 [P ¼ 0.02] and SB pluriparous sows ¼ 1.8, 1.4, and 1.7 [P ¼ 0.05] for the M, F, and C groups, respectively). The M group had the highest FS1 (for gilts) and FS2 (for pluriparous sows) values: FS1 ¼ 5.4, 4.9, and 4.9 mm [P ¼ 0.02] and FS2 ¼ 6.8, 5.3, and 6.3 mm [P ¼ 0.03] for the M, F, and C groups, respectively. There were no significant differences between the different treatments within each parity group with respect to any of the other variables. Overall, peforelin treatment had small but positive effects on the ER and follicle growth in certain parity groups but did not seem to affect litter sizes or FSH and progesterone levels in sows on the occasions of the corresponding examinations.

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Section: Paritymentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Effect of a GnRH analogue (Maprelin) on the reproductive performance of gilts and sows

Jong

Kauffold²,

Engl³

et al. 2013

Theriogenology

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“…The use of gonadotropins post-weaning in sows or following altrenogest treatment in gilts, both in order to stimulate the follicular development, can achieve an even better synchronization effect [5, 20]. In the mature pig, natural gonadotropin secretion is controlled through the release of hypothalamic peptides, gonadotrophin-releasing hormones (GnRH), which pass through the hypophyseal portal vessels to the pituitary gonadotrophs, causing the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) [22].…”

Section: Introductionmentioning

confidence: 99%

An evaluation of gonadotropin-releasing hormone analogue administered to gilts and sows on subsequent reproductive performance and piglet birth weight

Vangroenweghe¹,

Goossens²,

Jourquin³

2016

Porc Health Manag

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BackgroundThe present study investigated the effect of peforelin (Maprelin®), a gonadotropin-releasing hormone (GnRH) analogue, administration in gilts, primiparous and pluriparous sows in a high productive farm on sow reproductive performance and piglet quality at birth.MethodsIn a 400 sow herd, gilts, primiparous and pluriparous sows were randomly allocated to 2 groups: peforelin treated (peforelin = P-group) or no treatment (control = C-group). Animals were injected 48 h after the last altrenogest treatment (gilts) or 24 h post weaning (sows). Weaning-to-estrus interval (WEI), estrus rate (ER), farrowing efficiency index (FEI), farrowing rate (FR), number of total (TBP), live (LBP) and stillborn piglets (SBP), mummies (MM) and live piglet index (LPI) were assessed and compared between treatment groups. To assess piglet quality at birth, 6033 piglets from 426 litters were weighed individually within 24 h after birth (BW; birth weight).ResultsNo significant difference between treatment groups could be observed for WEI, TBP, LBP, SBP and MM. The ER was significantly (P = 0.0119) higher (93.2 %) in the P-group as compared to the C-group (87.2 %). Peforelin treatment did not affect farrowing rate. Both FEI and LPI were significantly (P = 0.0078) better in the P-group as compared to the C-group. Overall, no effect of peforelin treatment on piglet birth weight could be observed, although specific subcategories (1st parity and older (5+ parity) sows) did have a significant impact of treatment on birth weight. During late summer (August-September) all treated gilts and sows took advantage from peforelin treatment with a significant improvement of piglet birth weight.ConclusionPeforelin treatment had a significant impact on ER, FEI and LPI. Moreover, piglet birth weight improved for specific sow subcategories (1st parity and older sows) and for all gilts and sows during the late summer infertility period.

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“…Hormones used include human chorionic gonadotropin (hCG) (De Rensis et al 2003;Cassar et al 2004), gonadotropin-releasing hormone (GnRH) (De Rensis et al 2003;Martinat-Botté et al 2010), and porcine-luteinizing hormone (pLH) (Cassar et al 2005;Abad et al 2007). It has been demonstrated that female pigs tend to ovulate about 42 h after the administration of hCG (Hunter 1967;Roca et al 2003) and about 38 h after GnRH (Brussöw et al 2009) or LH (Abad et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Effect of the administration of GnRH or hCG on time of ovulation and the onset of estrus-to-ovulation interval in sows in Thailand

Wongkaweewit

Prommachart

Raksasub

et al. 2011

Trop Anim Health Prod

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The aim of the present study was to evaluate the control of ovulation by the administration of human chorionic gonadotropin (hCG) or gonadotropin-releasing hormone (GnRH) at the onset of estrus. Thirty-three multiparous sows housed under tropical conditions and showing standing estrus within 5 days after weaning were included. The sows were allocated to three groups, spontaneous ovulation (control group, n = 10), induced ovulation using 750 IU hCG (hCG group, n = 10), and induced ovulation using 50 μg GnRH (GnRH group, n = 13). The hormones were given at the onset of estrus and the occurrence of ovulation was monitored every 6 h by transrectal ultrasonography. Data for weaning-to-estrus interval, onset of estrus-to-ovulation interval (EOI), and the length of estrus were recorded. All sows in the control and hCG groups ovulated, while 3 out of 13 sows treated with GnRH developed cystic ovaries (did not ovulate). Of those sows ovulating, the EOI of the hCG (40.2 ± 1.7 h) and GnRH (37.5 ± 3.3 h) groups were shorter than that of the control group (63.6 ± 9.6 h; P < 0.05). In conclusion, the administration of either hCG or GnRH at the onset of estrus can control time of ovulation but, at the dose employed, sows receiving GnRH may develop ovarian cysts.

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Induction and synchronization of ovulations of nulliparous and multiparous sows with an injection of gonadotropin-releasing hormone agonist (Receptal)

Cited by 56 publications

References 17 publications

Effect of a GnRH analogue (Maprelin) on the reproductive performance of gilts and sows

Effect of a GnRH analogue (Maprelin) on the reproductive performance of gilts and sows

An evaluation of gonadotropin-releasing hormone analogue administered to gilts and sows on subsequent reproductive performance and piglet birth weight

Effect of the administration of GnRH or hCG on time of ovulation and the onset of estrus-to-ovulation interval in sows in Thailand

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