Topics:
Animal Refresher, Animal Reproduction
Sperm Reservoir in Sow
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Question (English)
Which of the following acts as sperm reservoir in sow?
- Vagina
- Cervix
- Utero-tubal junction ✓ Correct
- Uterus
Explanation:
Correct Answer: Utero-tubal junction
In the sow (pig), the primary sperm reservoir is the utero-tubal junction (UTJ) — the junction between the uterine horn and the oviduct.
Why UTJ in Sow?
- In the sow, AI semen is deposited directly into the uterus via a corkscrew-tipped catheter — spermatozoa bypass the cervix as a reservoir.
- Spermatozoa travel through the long uterine horns and accumulate at the utero-tubal junction, which regulates their entry into the oviduct.
Sperm Reservoir Comparison
- Cow, ewe, doe: Cervix
- Sow: Utero-tubal junction ✔
- Mare & bitch: Isthmus of oviduct
AI Method in Sow
- Corkscrew pipette method — 50 ml semen deposited into the uterus (not cervix) on the 2nd day of heat.
📚 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.
