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Effect of a GnRH analogue (peforelin) on the litter performance of gilts and sows

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Abstract
Background: Maintaining optimal reproductive and litter performance is essential for meeting economic targets in commercial pig production. Treatment with exogenous gonadotropins in sows after weaning or in gilts after altrenogest treatment has been used to stimulate follicular development leading to more piglets born and eventually higher birth weights. The effect of peforelin on litter performance was investigated in 212 gilts, primi- and pluriparous sows in three herds. Animals were randomly allocated to three treatments 24 h after weaning: peforelin (P group), eCG (E group), and physiological saline solution (C group). Numbers of total, liveborn and stillborn piglets and mortality rate during lactation were recorded. Birth weights and coefficient of variation in weights within litter were assessed. All parameters were compared among treatments. Results: Over all parities, no difference was found among treatments in litter size nor mortality rate, but birth weights were significantly lower in the E group. Stillbirth numbers in pluriparous sows were 2.2, 0.9 and 1.4 for P, E and C groups, respectively (p = 0.04). Piglets in the P group had significantly higher live born birth weights in gilts, compared to the E group (1.36, 1.26, 1.32 kg (p < 0.02) for P, E and C group, respectively). No significant differences were found for the other investigated parameters. Conclusions: Peforelin treatment showed no improvement of litter performance compared to no treatment.
Keywords
Sows, Gonadotropins, Peforelin, Prolificacy, Birth weight, FOLLICLE-STIMULATING-HORMONE, FSH-RELEASING FACTOR, PIGLET BIRTH-WEIGHT, REPRODUCTIVE-PERFORMANCE, GONADOTROPIN TREATMENT, EMBRYO SURVIVAL, PRIMIPAROUS SOW, OVULATION, GROWTH, PIGS

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Chicago
de Jong, Ellen, Jan Jourquin, Johannes Kauffold, Steven Sarrazin, Jeroen Dewulf, and Dominiek Maes. 2017. “Effect of a GnRH Analogue (peforelin) on the Litter Performance of Gilts and Sows.” Porcine Health Management 3.
APA
de Jong, E., Jourquin, J., Kauffold, J., Sarrazin, S., Dewulf, J., & Maes, D. (2017). Effect of a GnRH analogue (peforelin) on the litter performance of gilts and sows. PORCINE HEALTH MANAGEMENT, 3.
Vancouver
1.
de Jong E, Jourquin J, Kauffold J, Sarrazin S, Dewulf J, Maes D. Effect of a GnRH analogue (peforelin) on the litter performance of gilts and sows. PORCINE HEALTH MANAGEMENT. 2017;3.
MLA
de Jong, Ellen, Jan Jourquin, Johannes Kauffold, et al. “Effect of a GnRH Analogue (peforelin) on the Litter Performance of Gilts and Sows.” PORCINE HEALTH MANAGEMENT 3 (2017): n. pag. Print.
@article{8535555,
  abstract     = {Background: Maintaining optimal reproductive and litter performance is essential for meeting economic targets in commercial pig production. Treatment with exogenous gonadotropins in sows after weaning or in gilts after altrenogest treatment has been used to stimulate follicular development leading to more piglets born and eventually higher birth weights. The effect of peforelin on litter performance was investigated in 212 gilts, primi- and pluriparous sows in three herds. Animals were randomly allocated to three treatments 24 h after weaning: peforelin (P group), eCG (E group), and physiological saline solution (C group). Numbers of total, liveborn and stillborn piglets and mortality rate during lactation were recorded. Birth weights and coefficient of variation in weights within litter were assessed. All parameters were compared among treatments. 
Results: Over all parities, no difference was found among treatments in litter size nor mortality rate, but birth weights were significantly lower in the E group. Stillbirth numbers in pluriparous sows were 2.2, 0.9 and 1.4 for P, E and C groups, respectively (p = 0.04). Piglets in the P group had significantly higher live born birth weights in gilts, compared to the E group (1.36, 1.26, 1.32 kg (p {\textlangle} 0.02) for P, E and C group, respectively). No significant differences were found for the other investigated parameters. 
Conclusions: Peforelin treatment showed no improvement of litter performance compared to no treatment.},
  articleno    = {6},
  author       = {de Jong, Ellen and Jourquin, Jan and Kauffold, Johannes and Sarrazin, Steven and Dewulf, Jeroen and Maes, Dominiek},
  issn         = {2055-5660},
  journal      = {PORCINE HEALTH MANAGEMENT},
  keyword      = {Sows,Gonadotropins,Peforelin,Prolificacy,Birth weight,FOLLICLE-STIMULATING-HORMONE,FSH-RELEASING FACTOR,PIGLET BIRTH-WEIGHT,REPRODUCTIVE-PERFORMANCE,GONADOTROPIN TREATMENT,EMBRYO SURVIVAL,PRIMIPAROUS SOW,OVULATION,GROWTH,PIGS},
  language     = {eng},
  pages        = {6},
  title        = {Effect of a GnRH analogue (peforelin) on the litter performance of gilts and sows},
  url          = {http://dx.doi.org/10.1186/s40813-017-0054-5},
  volume       = {3},
  year         = {2017},
}

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