Which event directly triggers ovulation?

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Prepare for the VetSkill Level 3 Diploma VN03 - Principles of Veterinary Nursing Care 1 Test. Review essential topics with flashcards and multiple choice questions, complete with hints and detailed explanations. Ensure your success with focused study sessions!

Multiple Choice

Which event directly triggers ovulation?

Explanation:
A sharp rise in luteinizing hormone (LH) directly triggers ovulation. As the dominant follicle matures, it secretes increasing estrogen, which eventually causes the pituitary to release a surge of LH. That LH surge drives the enzymatic breakdown of the follicle wall and follicle rupture, releasing the oocyte. After ovulation, the empty follicle becomes the corpus luteum. FSH mainly supports early follicle growth, not the actual release. Estrogen's rising levels initiate the LH surge but do not directly cause ovulation by themselves. Prostaglandins help the rupture process, but the primary trigger is the LH surge.

A sharp rise in luteinizing hormone (LH) directly triggers ovulation. As the dominant follicle matures, it secretes increasing estrogen, which eventually causes the pituitary to release a surge of LH. That LH surge drives the enzymatic breakdown of the follicle wall and follicle rupture, releasing the oocyte. After ovulation, the empty follicle becomes the corpus luteum.

FSH mainly supports early follicle growth, not the actual release. Estrogen's rising levels initiate the LH surge but do not directly cause ovulation by themselves. Prostaglandins help the rupture process, but the primary trigger is the LH surge.

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