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The ovine placenta and placentitis-A review
D Sammin1, B Markey, H Bassett
1Central Veterinary Research Laboratory, DAFF Laboratories, Backweston, Celbridge, Co. Kildare, Ireland.
Veterinary Microbiology
|November 5, 2008
Summary
Understanding ovine placental structure and function is key to diagnosing infectious placentitis and abortion. This review details normal ovine pregnancy and placentation for researchers and pathologists.
Area of Science:
- Veterinary Pathology
- Reproductive Biology
- Immunology
Background:
- Infectious placentitis and abortion in sheep necessitate a deep understanding of placental complexities.
- Ovine placentation involves intricate morphological and physiological adaptations crucial for successful pregnancy.
Purpose of the Study:
- To elucidate key aspects of ovine pregnancy and placentation for researchers and diagnostic pathologists.
- To provide a foundation for understanding pathological changes in placentitis.
Main Methods:
- Review of existing literature on ovine placental morphology and physiology.
- Description of the chorioallantoic, villous, cotyledonary, and synepitheliochorial ovine placenta.
- Explanation of physiological features: immune modulation, blood flow regulation, and hormone secretion.
Main Results:
- Detailed morphological classification of the ovine placenta.
- Explanation of the developmental process from early apposition to definitive placenta.
- Identification of essential physiological functions for normal pregnancy and fetal development.
Conclusions:
- A thorough grasp of normal ovine placental structure and function is critical for diagnosing infectious placentitis and abortion.
- Understanding these normal processes provides context for identifying and interpreting pathological changes affecting placental function.
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