Risk Factors Associated with Stillbirth in Swine Farms in Vietnam. World Vet. J., 10 (1): 74-79. DOI: https://dx.doi.org/10.36380/scil.2020.wvj10;

Stillbirth in pig has been studied worldwide, but, its situation in Vietnam has never been reported. Therefore, present study aimed to investigate effects of herd, parity, gestation length, birth litter size and farrowing duration on stillbirth at sow level in swine farms in Vietnam. Data was collected from 1174 litters of 1174 Landrace x Yorkshire crossbred sows in 16 farms in the North of Vietnam. Potential risk factors for stillbirth were identified by using logistic regression. The incidence of stillbirth at sow level was 47.9%, and the stillbirth rate was 5.2%. Multivariate logistic regression showed that parity 1 (OR=1.81, 95%CI=1.24-2.63) and >4 (OR=1.87, 95% CI=1.33-2.64), a gestation length <114 days (OR=1.80, 95%CI=1.23-2.65), a birth litter size ≥9 piglets (OR=1.64, 95%CI=1.04-2.61) and a farrowing duration ≥5 hours (OR=1.48, 95%CI=1.05-2.09) were risk factors for stillbirth. This study indicated that stillbirth was common in swine farms in Vietnam. Special attention should be paid to sows at parity 1, > 4, sows with a short gestation, sows with a large birth litter size and sows with a long farrowing duration to reduce stillbirth. Since the use of highly prolific sows is increasing, stillbirth continues to be an issue to be dealt with in swine farms in Vietnam.

[1]  P. Sukon,et al.  Risk Factors Associated with Stillbirth in Swine Farms in Vietnam. , 2020 .

[2]  J. Nielsen,et al.  Association between sow and piglet blood hemoglobin concentrations and stillbirth risk , 2019, Acta veterinaria Scandinavica.

[3]  J. Nielsen,et al.  Iron treatment of pregnant sows in a Danish herd without iron deficiency anemia did not improve sow and piglet hematology or stillbirth rate , 2019, Acta Veterinaria Scandinavica.

[4]  O. Peltoniemi,et al.  Prolonged parturition and impaired placenta expulsion increase the risk of postpartum metritis and delay uterine involution in sows. , 2018, Theriogenology.

[5]  L. Pedersen,et al.  Sow-level risk factors for stillbirth of piglets in organic sow herds. , 2017, Animal : an international journal of animal bioscience.

[6]  Y. Koketsu,et al.  Factors for improving reproductive performance of sows and herd productivity in commercial breeding herds , 2017, Porcine health management.

[7]  R. Kirkwood.  Induction of Parturition in Sows , 2015 .

[8]  A. de Kruif,et al.  Non-infectious factors associated with stillbirth in pigs: a review. , 2013, Animal reproduction science.

[9]  A. de Kruif,et al.  Longitudinal field study to assess sow level risk factors associated with stillborn piglets. , 2010, Animal reproduction science.

[10]  A. Lawrence,et al.  Indicators of piglet survival in an outdoor farrowing system , 2009 .

[11]  K. Dzama,et al.  Some non-genetic factors affecting commercial pig production in Zimbabwe , 2009 .

[12]  F. Akdağ,et al.  The effect of parity and litter size on birth weight and the effect of birth weight variations on weaning weight and pre-weaning survival in piglet. , 2009 .

[13]  J. DeRouchey,et al.  Effects of piglet birth weight and litter size on the preweaning growth performance of pigs on a commercial farm , 2009 .

[14]  M. Taverne,et al.  Parturition in domestic animals: targets for future research. , 2008, Reproduction in domestic animals = Zuchthygiene.

[15]  L. Canario,et al.  Genetic correlations between gestation length, piglet survival and early growth , 2008 .

[16]  Y Koketsu,et al.  Variability and repeatability in gestation length related to litter performance in female pigs on commercial farms. , 2007, Theriogenology.

[17]  D. Mota-Rojas,et al.  Effect of Different Doses of Oxytocin at Delivery on Suffering and Survival of Newborn Pigs , 2007 .

[18]  A. Nava-Ocampo,et al.  Influence of time at which oxytocin is administered during labor on uterine activity and perinatal death in pigs. , 2007, Biological research.

[19]  J. Foulley,et al.  Between-breed variability of stillbirth and its relationship with sow and piglet characteristics. , 2006, Journal of animal science.

[20]  H. Sumano,et al.  Comparative routes of oxytocin administration in crated farrowing sows and its effects on fetal and postnatal asphyxia. , 2006, Animal reproduction science.

[21]  D. Mota-Rojas,et al.  Perinatal asphyxia pathophysiology in pig and human: a review. , 2005, Animal reproduction science.

[22]  M. Taverne,et al.  Factors affecting duration of the expulsive stage of parturition and piglet birth intervals in sows with uncomplicated, spontaneous farrowings. , 2005, Theriogenology.

[23]  M. Bernardi,et al.  Risk factors for stillbirth and foetal mummification in four Brazilian swine herds. , 2005, Preventive veterinary medicine.

[24]  E. Knol,et al.  Stillbirth in the pig in relation to genetic merit for farrowing survival. , 2003, Journal of animal science.

[25]  Yannick Le Cozler,et al.  Factors associated with stillborn and mummified piglets in high-prolific sows , 2002 .

[26]  M. N. Corrêa,et al.  Risk factors for stillbirths in two swine farms in the south of Brazil. , 2002, Preventive veterinary medicine.

[27]  J.A.M. van Arendonk,et al.  Direct, maternal and nurse sow genetic effects on farrowing-, pre-weaning- and total piglet survival , 2002 .

[28]  Egbert F. Knol,et al.  Analysis of stillbirth in different lines of pig , 1999 .

[29]  R. Hacker,et al.  Variables related to the progress of parturition and probability of stillbirth in swine. , 1993, The Canadian veterinary journal = La revue veterinaire canadienne.

[30]  D. W. Friend,et al.  FACTORS INFLUENCING, AND REPEATABILITY OF THE DURATION OF FARROWING IN YORKSHIRE SOWS , 1981 .

[31]  E. B. Olson.  Role of glucocorticoids in lung maturation. , 1979, Journal of animal science.

[32]  D. Sprecher,et al.  Causes and control of swine stillbirths. , 1974, Journal of the American Veterinary Medical Association.

[33]  J. Mcarthur.  Diseases of the reproductive system. , 1952, Annual review of medicine.