Reproductive performance in gilts following applications of different insemination doses and techniques
| Autor: | Kelly Jaqueline Will, Mariáh Negri Musskopf, Rafael da Rosa Ulguim, Fernando Pandolfo Bortolozzo, Ana Paula Gonçalves Mellagi, Danielle Fermo Silveira, Rafael Kummer |
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| Rok vydání: | 2021 |
| Předmět: |
Male
Swine medicine.medical_treatment Sus scrofa Semen Insemination Animal science Estrus Food Animals Pregnancy medicine Animals Cannula insertion Small Animals Insemination Artificial Estrous cycle Equine business.industry Reproduction Artificial insemination Intrauterine cannula Sperm Pregnancy rate Female Animal Science and Zoology business |
| Zdroj: | Theriogenology. 160:26-32 |
| ISSN: | 0093-691X |
| Popis: | This study evaluated the applicability of intrauterine artificial insemination (IUAI) in gilts and the impact of age at insemination and different body characteristics of gilts on the success rate for cannula insertion. Additionally, reproductive performance was evaluated for IUAI and cervical artificial insemination (CAI), considering different semen dose sizes. A total of 636 gilts were assigned in a 2 × 2 factorial design: two artificial insemination techniques (CAI and IUAI) and two semen dose sizes (1.5 × 109 sperm cells/50 mL or 2.5 × 109 sperm cells/80 mL). In those gilts assigned to IUAI (n = 319) the success rate for intrauterine cannula insertion was evaluated according to weight at first detected estrus, body condition score (BCS), and age at insemination. Reproductive performance, occurrence of bleeding, and semen backflow during all inseminations were compared among groups (2 × 2). Two subgroups were evaluated regarding the time expended to perform insemination (n = 380), and the semen backflow collected during 1 h after insemination (n = 114). The success rate for intrauterine cannula insertion, based on a successful insertion in all inseminations performed during estrus, was 58.9%. Additionally, greater possibility (>60%; P ≤ 0.04) of cannula insertion was observed in heavier gilts (≥124 kg), as well as in older gilts (≥225 d) and those with greater BCS (>3). There were no differences among the groups in pregnancy rate (≥95.3%; P = 0.23), farrowing rate (≥93.7%; P = 0.54), total piglets born (≥14.5; P = 0.45), as well as, bleeding (P = 0.48) and backflow (P = 0.48) during insemination. However, the percentage of semen backflow volume and percentage of sperm cells in the backflow were lower in gilts inseminated by CAI with 1.5 billion sperm cells/50 mL (P |
| Databáze: | OpenAIRE |
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