Question

in animals with induced ovulation, when does ovulation occur?

a. in a regular cycle, regardless of mating
b. in response to hormone levels rising during pro-oestrus
c. only at certain times of the year
d. in response to mating or physical stimulation

Explanation:

Define induced ovulation

Using the Induced Ovulation knowledge point

Induced ovulation is a reproductive strategy where the release of an egg (ovulation) is triggered directly by external mechanical or physical stimuli, specifically the act of mating or copulation, rather than occurring spontaneously as part of a regular cyclical hormonal rhythm.

Evaluate the options

Using the Induced Ovulation knowledge point

• Option (a) describes spontaneous ovulation, which occurs independently of mating.
• Option (b) describes spontaneous ovulation driven by endogenous hormonal cycles.
• Option (c) describes seasonal breeding patterns, which can apply to both spontaneous and induced ovulators but does not define the mechanism of ovulation itself.
• Option (d) correctly identifies that ovulation is triggered by mating or physical stimulation.

Answer:

• a. In a regular cycle, regardless of mating
• b. In response to hormone levels rising during pro-oestrus
• c. Only at certain times of the year
• d. In response to mating or physical stimulation (Correct answer)