Animals with Annular Rings in Cervix
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Question (English)
Annular rings are present in the cervix of:
- Ruminants and She-camel ✓ Correct
- Ruminants and Mare
- Ruminants and Sow
- Ruminants and Bitch
Correct Answer: Ruminants and She-camel
Annular rings (transverse ridges/folds in the cervical lumen) are a characteristic anatomical feature of the cervix in ruminants (cattle, buffalo, sheep, goat) and she-camels. These rings provide tight sealing of the uterus during pregnancy (cervical plug) and complicate deep cervical penetration during AI.
Cervical Anatomy Across Species
- Ruminants + She-camel: Annular rings (transverse folds) — difficult to pass a catheter deeply
- Sow: Spiral/corkscrew folds — requires spiral-tipped (corkscrew) AI pipette
- Mare: Soft, easily dilated cervix — straightforward to pass
- Bitch: Narrow, angled cervix — difficult to catheterize
Clinical Implication
The annular rings in ruminant cervices make deep intracervical and transcervical uterine AI technically challenging, which is why laparoscopic intrauterine AI is sometimes used in sheep for frozen semen.
📚 About this Topic — Animal Refresher
This multiple choice question is from Animal Refresher, Animal Reproduction. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Refresher to strengthen your preparation.
