A mare is what type of ovulator?

A mare is what type of ovulator?

• A. Year-round estrous with induced ovulation
• B. Seasonal anestrus with spontaneous ovulation
• C. Seasonal polyestrous with spontaneous ovulation
• D. Nonseasonal monoestrous with induced ovulation

Answer: (C)

Mares exhibit seasonal breeding with multiple estrous cycles during the breeding season, and they ovulate spontaneously. Day length drives their reproductive axis, so as days lengthen in spring and summer, several cycles occur, and each cycle can lead to ovulation without needing mating to trigger it. Outside the breeding season, they become anestrous. This pattern fits as seasonal polyestrous with spontaneous ovulation: multiple cycles within a restricted season, with ovulation occurring on its own during each cycle. Induced ovulation describes species that ovulate due to mating stimulus, which isn’t how mares operate, and nonseasonal patterns (year-round or monoestrous) don’t match the mare’s seasonal, multi-cycle biology.

Mares exhibit seasonal breeding with multiple estrous cycles during the breeding season, and they ovulate spontaneously. Day length drives their reproductive axis, so as days lengthen in spring and summer, several cycles occur, and each cycle can lead to ovulation without needing mating to trigger it. Outside the breeding season, they become anestrous.

This pattern fits as seasonal polyestrous with spontaneous ovulation: multiple cycles within a restricted season, with ovulation occurring on its own during each cycle. Induced ovulation describes species that ovulate due to mating stimulus, which isn’t how mares operate, and nonseasonal patterns (year-round or monoestrous) don’t match the mare’s seasonal, multi-cycle biology.