Sperm reservoir in cow, ewe & doe is:

Correct Answer: Cervix

In the cow, ewe, and doe, the cervix acts as the primary sperm reservoir. After mating or AI, spermatozoa are stored in the cervical crypts (annular rings of the cervix) from where they are gradually released into the uterus and oviduct over time.

Sperm Reservoir by Species

• Cow, ewe, doe: Cervix ✔
• Sow: Utero-tubal junction
• Mare & bitch: Oviduct (isthmus)

Cervix as Sperm Reservoir — Practical Importance

• In cattle AI, semen is deposited at the utero-cervical junction (mid-cervix or cervico-uterine junction) — not past the cervix — because the cervical crypts serve as the reservoir.
• The cervix filters abnormal spermatozoa and provides a sustained release of capacitated sperm toward the oviduct.
• Annular rings (transverse folds) in the cervix of ruminants and she-camel are the structures forming the crypts.