Q.1
Which one of the following animal is not a reflex ovulator?
- Mechanisms of Ovulation in Mammals:
- Reflex / Induced Ovulators: Ovulation does not occur spontaneously at the end of the follicular phase; mechanical coital stimulation of vaginal/cervical sensory mechanoreceptors is strictly required to trigger a neuroendocrine surge of GnRH and LH.
- Examples: Cat (Queen), Rabbit (Doe), Camel (Camelus), Ferret, Mink.
- Spontaneous Ovulators: Cyclic rising levels of follicular estradiol trigger the pre-ovulatory LH surge and ovulation independently of copulation:
- Examples: Dog (Bitch), Cow, Mare, Ewe, Sow, Human.
- nalysis:
- (Dog): Correct (spontaneous ovulator, not a reflex ovulator).
Correct option: (2) Dog
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