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Combined oral contraceptives primarily prevent pregnancy... | QuestionStock

Representative image for question: Combined oral contraceptives primarily prevent pregnancy by which physiological mechanism?

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Health

Combined oral contraceptives primarily prevent pregnancy by which physiological mechanism?

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Combined oral contraceptives primarily prevent pregnancy by which physiological mechanism?

Options:

Creating a hostile uterine lining that prevents implantation
Killing sperm on contact in the vagina
Suppressing ovulation by inhibiting the LH surge
Blocking tubal transport of the ovum

Correct answer: Suppressing ovulation by inhibiting the LH surge

Explanation: Combined oral contraceptives (estrogen plus progestin) suppress ovulation by inhibiting gonadotropin release and the LH surge; the combined pill was first widely introduced in 1960.

Created 2026-03-10T17:34:18.666Z. Updated 2026-03-10T17:34:18.666Z.