Which of the following most strongly triggers a mare's annual reproductive transition from the sexually inactive period to the breeding period?
access to stallions
ambient temperature
period of daylight

What is the average age at which a mare becomes sexually mature (begins ovulating)?
12-18 months
18-24 months
2-3 years

A mare is more likely to successfully conceive and carry a foal if she is in what sort of condition at the time of breeding?
if she is thin
if she is carrying normal weight
if she is fat

What is the average length of time the stallion's sperm will remain viable for fertilization in the mare after mating?
6-12 hours
12-24 hours
24-48 hours

A mare's period of extended sexual inactivity is known as ... ?
estrous
anestrous
diestrous

At what point during most mares' estral cycles are they capable of conception?
toward the beginning of the cycle
in the middle of the cycle
toward the end of the cycle

Which of the following mares has never had a foal?
barren mare
maiden mare
open mare

When breeding is accomplished by artificial insemination (AI), how many mares on average can be serviced by a single collection from a stallion?
5
10
20

How long on average will an ovum (egg) remain viable in the mare after ovulation and before fertilization?
3-12 hours
24-48 hours
3-6 days

Under natural circumstances, the majority of horses become most sexually active during what period?
mid-spring through mid-summer
late summer through fall
late winter through early spring