Artificial Insemination Strategies in Ovine Reproduction
Summary
Artificial insemination (AI) in sheep has evolved into a multifaceted suite of reproductive biotechnologies designed to enhance genetic progress, biosecurity and production efficiency. Strategies range from simple vaginal and cervical deposition of semen to more advanced intrauterine techniques such as laparoscopic and transcervical insemination. Success depends on precise management of the oestrous cycle through hormonal induction and synchronisation, alongside optimisation of semen handling and preservation (fresh, chilled or frozen-thawed). Breed-specific anatomical and physiological factors, notably cervical anatomy and mucus properties, dictate choice of method and influence fertility outcomes. In extensive farming systems, laparoscopic AI offers high pregnancy rates but requires specialist equipment and training, while transcervical approaches reduce invasiveness yet may demand surgical modification of cervical folds. Global implementation of AI underpins genetic improvement programmes, facilitates disease control and can yield economic benefits through sale of elite-genotype stock and enhanced flock performance. Continued refinement of timing protocols, synchronisation schemes and deposition techniques is widening the accessibility of AI, promoting sustainable sheep production across diverse agro-ecological zones.
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Artificial Insemination Strategies in Ovine Reproduction publication trend
The graph below shows the total number of articles in artificial insemination strategies in ovine reproduction across all publications each year (not limited to Nature Index journals).
Technical terms
Estrus synchronisation: Use of exogenous hormones to align the oestrous cycles of multiple ewes, facilitating fixed-time insemination.
Frozen-thawed semen: Semen cryopreserved in liquid nitrogen and subsequently thawed for AI, enabling long-term storage and global exchange of genetics.
Laparoscopic artificial insemination (LAI): A minimally invasive surgical technique depositing semen directly into the uterine horns under endoscopic guidance.
Transcervical insemination: Placement of semen intrauterinely by navigating instruments through the cervix, sometimes aided by surgical modification of cervical folds.
Cervical anatomy: The structural features of the ewe’s cervix, including ring-like folds and mucus secretions, which influence sperm transport and choice of AI method.
References
- Optimal time for laparoscopic intrauterine insemination performed on ewes detected in natural heat. Saudi Journal of Biological Sciences (2022).
- Technical recommendations for artificial insemination in sheep. Animal Reproduction (2019).
- Ewe breed differences in cervical anatomy and cervicovaginal mucus properties: An international study. Theriogenology (2020).
- Laparoscopic Artificial Insemination Technique in Small Ruminants—A Procedure Review. Frontiers in Veterinary Science (2018).
- Reproductive Performance Following Transcervical Insemination with Frozen Thawed Semen in Ewes Submitted to Surgical Incision of Cervical Folds (SICF): Comparison with Laparoscopic Artificial Insemination. Animals (2020).
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