Seasonal infertility in gilts and sows: Aetiology, clinical implications and treatments

F De Rensis, AJ Ziecik, RN Kirkwood - Theriogenology, 2017 - Elsevier
In gilts and sows, the summer-autumn period often is characterized by reduced fertility. Heat
stress and long photoperiods during the warm season can cause a reduction in feed intake …

Seasonal and management effects on fertility of the sow: a descriptive study

OAT Peltoniemi, RJ Love, M Heinonen… - Animal Reproduction …, 1999 - Elsevier
This study was undertaken to determine management and seasonal effects on fertility in
1298 Finnish sow units over a 4-year period in 1992–1996. A multivariate analysis of the …

Seasonal changes in semen characteristics, composition of seminal plasma and frequency of acrosome reaction induced by calcium and calcium ionophore A23187 …

T Murase, N Imaeda, H Yamada… - Journal of Reproduction …, 2007 - jstage.jst.go.jp
This study attempted to explain the mechanisms regulating boar fertility by examining
seasonal changes in semen characteristics, the composition of seminal plasma and …

Treatment of swine summer infertility syndrome by means of oxytocin under field conditions

FJ Peña, JC Dominguez, M Carbajo, L Anel, B Alegre - Theriogenology, 1998 - Elsevier
Endogenous oxytocin is released by the sow at the time of mating in response to stimulation
by the boar, which may explain, at least partially, the importance of the relationship between …

Relevance of ovarian follicular development to the seasonal impairment of fertility in weaned sows

TP Lopes, J Sanchez-Osorio, A Bolarin… - The Veterinary …, 2014 - Elsevier
A field study was conducted to estimate seasonal differences in follicular development in
weaned sows and to evaluate the implication of these differences on seasonal infertility. A …

Effect of season and parity on reproduction performance of Iberian sows bred with Duroc semen

J Piñán, B Alegre, RN Kirkwood, C Soriano-Úbeda… - Animals, 2021 - mdpi.com
Simple Summary The Iberian pig is appreciated for the organoleptic and nutritional
characteristics of its meat. Traditional breeding is extensive, but many farms perform …

Abortion occurrence, repeatability and factors associated with abortions in female pigs in commercial herds

R Iida, C Piñeiro, Y Koketsu - Livestock Science, 2016 - Elsevier
Abortion occurrences disturb the projected production volume and increase non-productive
days of female pigs. The objectives of the present study were (1) to define abortion …

Thermal comfort and photoperiod on the productive performance of sows and piglets

R Kuhl, CHFZ Dias, GC Alberton, F Granzotto… - Ciência Rural, 2022 - SciELO Brasil
Pigs have difficulty in performing heat exchange and; therefore, it is important to consider the
environmental factors that impact their productive performance. This study evaluated the …

Effect of vulvomucosal injection of PGF2α at insemination on subsequent fertility and litter size in pigs under field conditions

FJ Pena, JC Domı́nguez, B Alegre, J Pelaez - Animal reproduction science, 1998 - Elsevier
The aim of this study was to determine the effects of injecting 5 mg of PGF2α into the vulvar
mucosa on the reproductive performance of sows maintained under field conditions. At an …

Physiological and productive responses of environmental control on housed sows

CEB Romanini, YB Tolon, IA Nääs, DJ Moura - Scientia Agricola, 2008 - SciELO Brasil
Swine housing must promote an adjusted environment for thermal comfort and high animal
productivity without negatively affecting the sow performance and reproductive response …