Site of Semen Deposition in Sow and Mare (AI)

Site of deposition of semen in sow and mare during artificial insemination is:

Correct Answer: Uterus

In both the sow and the mare, semen is deposited directly into the uterus during artificial insemination. This is necessary because the cervix in these species does not act as an effective sperm reservoir (unlike in ruminants).

Site of Semen Deposition by Species

• Cow: Utero-cervix (mid-cervix) — rectovaginal method
• Ewe: Cervix — vaginal speculum method
• Sow: Uterus — corkscrew pipette method
• Mare: Uterus — vaginal/per-vaginal method

Why Uterine Deposition in Sow and Mare?

• In sows, the cervix has spiral folds (interlocking ridges) that prevent deep penetration by a straight catheter — the corkscrew pipette locks into the cervix and delivers semen into the uterus.
• In mares, the cervix is soft and easily traversed during estrus, allowing direct uterine deposition.