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Development of Methods for Precise Control of Reproduction in Early-Weaned Sows Sows that have their litters weaned before 2 weeks of age may experience a variety of reproductive problems such as failing to return to heat, developing cystic follicles, displaying irregular heats, having poor conception rates and delivering small-sized litter sizes at the next farrowing.
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Shelf Life of Semen Extended with antibiotics
Artificial insemination using fresh diluted semen is used worldwide in the swine industry. Diluted semen is stored for 3 days to 7 days in certain extenders, eg. BTS, Androhep®, Xcell®. Viability of spermatozoa in diluted semen depends on several factors, such as type of extender, type of antibiotics and degree of contamination in semen.
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Relationships Between Estimates of Fertility and Motility for Porcine Spermatozoa
Evaluation of the percentage of spermatozoa exhibiting progressive forward motility is the most commonly used indicator of both viability and fertility for porcine semen. While it is generally accepted that motility is a fairly accurate indicator of viability, its relationship with fertility is less clear. The objective of the present study was to estimate the relationship between motility and fertility of porcine semen.
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Using fresh and frozen semen in Swine AI Programs
Raw semen is often the choice of swine producers just getting started in artificial insemination. Acceptable conception rates and litter size can be achieved using raw semen. Some of the potential problem associated with freezing or storing semen can be avoided by using raw semen as soon as possible after collection.
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