Abstract
ABSTRACT Recent studies have focused on the use of seminal plasma to increase sow fertility after classical intracervical artificial insemination (AI). The aim of the present study was to investigate the influence of seminal plasma infusion, prior to the application of conventional AI dose, on the fertility rate in sows. A total of 114 sows were treated with intrauterine infusion of 30ml seminal plasma (SP), while 114 control sows were infused by physiological solution (PS), immediately before the application of conventional AI dose. The experiment was conducted at one commercial pig farm in Serbia, which is comprised of 1,500 sows in the breeding herd. Intrauterine infusion of seminal plasma produced significantly (P<0.05) higher farrowing rate (93.8%) and significantly (P<0.01) more live-born piglets per litter (12.27), compared with the control sows (83.33% farrowing rate and 10.48 piglets). The present results show that intrauterine infusion of seminal plasma can be a useful tool for increasing the fertility rate in artificially inseminated sows, under the conditions of practical intensive pig production.
Highlights
In most European countries, diluted liquid semen in the dose volume of 80ml, with average 3 109 motile spermatozoa are used for conventional intracervical artificial insemination (Roca et al., 2001; Stančić et al, 2009; Khalifa et al, 2014)
Before the conventional application of artificial insemination (AI) dose, the experimental sows were treated with intrauterine infusion via intracervical catheter for post cervical insemination with 30ml seminal plasma
The sows treated with intrauterine infusion of 30ml seminal plasma, prior to conventional AI dose application, have significantly (P
Summary
In most European countries, diluted liquid semen in the dose volume of 80ml, with average 3 109 motile spermatozoa are used for conventional intracervical artificial insemination (Roca et al., 2001; Stančić et al, 2009; Khalifa et al, 2014). A single boar produces about 20 doses per ejaculate, or 1,200 of such insemination doses annually. This means that a certain number of ejaculates must be overdiluted (Singelton, 2004; Stančić et al, 2009). Using overdiluted AI doses is frequently recognized as a reason for reduced fertility in artificially inseminated sows (Gadea, 2005; Alm et al, 2006). Ejaculate over dilution decreases the concentration of bioactive components in the seminal plasma, which influences the physiological processes important for successful transport and function of spermatozoa, as well as successful fertilization and embryo development in the female reproductive tract (Robertson, 2005, 2007; Rodríguez-Martínez et al, 2011; Jalali et al, 2014)
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