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Abstracts - Genetics and reproduction

A comparison between nulliparous and multiparous sows cervix with regard to post-cervical AI

The future design of AI strategies and catheters should take into consideration the morphological variations of the cervix lumen, which will depend on age and parity of the females.

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Absence of seminal plasma from sperm-rich fraction decreases boar sperm quality characteristics

The seminal plasma from the sperm-rich fraction is important for the maintenance of adequate structural and functional characteristics of extended liquid boar semen.

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A new device for deep cervical artificial insemination in gilts

The use of the deep cervical AI technique provides a new AI method as an alternative to cervical insemination and post-cervical artificial insemination for pigs.

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Impact of light irradiation on preservation and function of mammalian spermatozoa

Mounting evidence indicates that light irradiation of mammalian spermatozoa (and of other animal species) increases their motility, capacitation and fertilizing ability, without causing any damage on the DNA.

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Sperm membrane proteins associated with the boar semen cryopreservation

Boars sperm membrane proteins may explain differences in semen cryopreservation success, serving as freezability markers.

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Effect of enriching the sow environment and diet during gestation on maternal stress and piglet survival

Enriching the sow environment and diet during gestation therefore improved sow welfare and reduced piglet mortality at and soon after birth.

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Stillbirths in relation to sow hematological parameters at farrowing: A cohort study

Piglet stillbirth was associated with several hematological parameters of the sow, namely hemoglobin concentration, mean cell hemoglobin concentration...

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Indirect genetic effects for growth rate in domestic pigs alter aggressive and manipulative biting behaviour

The results of this study show opportunities to reduce harmful biting behaviours in pigs.

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The effect of age, interval collection and season on selected semen parameters and prediction of AI boars productivity

The possibility of planning the production level has a special importance for AI stations, and its inaccuracy should be minimized by eliminating the factors differentiating the quantity and quality of the ejaculate.

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The genetic correlation between scapula shape and shoulder lesions in sows

It is expected to improve the genetic progress of shoulder lesions and body condition score.

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Effects of the different levels of dietary vitamin D on boar performance and semen quality

The possible mechanism of vitamin D action on boar performance was explored.

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Genome-wide association study for sow lifetime productivity related traits in a Landrace purebred population

A genome-wide association study was performed to identify quantitative trait loci for SLP-related traits. A total of five genome-wide suggestive significant single nucleotide polymorphisms were identified.

Pig glossary

Definition for the most commonly used pig terms

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Effects of betaine and heat stress on lactation and postweaning reproductive performance of sows

This study was conducted to evaluate the underlying physiological changes during heat stress and the effect of betaine supplementation in lactating sows.

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Two commercial Type 1 PRRSV-modified live vaccines reduce seminal shedding of Type 1 PRRSV in infected boars

The results of this study provide clinical information on how to reduce seminal shedding of type 1 PRRSV in boars using type 1 PRRSV-modified live vaccine.

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Combination of oviduct fluid and heparin to improve monospermic zygotes production during porcine in vitro fertilization

The present study was designed to evaluate the effect of porcine oocytes exposure to oviduct fluid before in vitro fertilization, during in vitro fertilization and during in vitro fertilization in combination with heparin.

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A comparative study of the effects of Escherichia coli and Clostridium perfringens upon boar semen preserved in liquid storage

The effects of infection by E. coli were dependent of both bacterial load and storage period, whereas the effects of C. perfringens were mainly dependent on the bacterial load.

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Age and seasonal-dependent variations in the biochemical composition of boar semen

Age- and seasonal-related variations affect the reproductive tract functions in the boar.

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Fusion of boar sperm with nanoliposomes prepared from synthetic phospholipids

This study used flow cytometry to demonstrate stable incorporation of nanoliposomes prepared from a complex mixture of various phospholipids.

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An economic analysis of sow retention in a United States breed-to-wean system

Retaining sows in the herd longer has economic benefits that could increase the financial returns of a breed-to-wean system.

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Protect fetuses from infection with PRRSV

In this study, CD163-positive fetuses were completely protected from PRRSV in dams possessing a complete knockout of the CD163 receptor.

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Factors of importance when selecting sows as embryo donors

The improvement in porcine embryo preservation and non-surgical embryo transfer (ET) procedures achieved in recent years represents essential progress for the practical use of ET in the pig industry.

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Reproductive performance following non-surgical deep uterine porcine embryo transfer

The aim of this study was to evaluate the effects of the weaned recipients' parity on fertility and prolificacy following NsDU-ET.

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CRISPR to make a reduced-fat pig

UCP1 KI pigs are a potentially valuable resource for agricultural production through their combination of cold adaptation with reduced fat deposition.

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