Igcse Model Questions Vol1 2022 Biology Question 16
Practice objective / multiple choice question 16 from the 2022 Igcse Model Questions Vol1 Biology examination.
In a 28‑day menstrual cycle, the concentration of estrogen (E) rises linearly from 20 pg mL⁻¹ on day 1 to a peak of 200 pg mL⁻¹ on day 12, then falls linearly to 150 pg mL⁻¹ on day 14. An LH surge occurs as soon as the estrogen concentration exceeds 180 pg mL⁻¹. On which day does the LH surge first begin?
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This is Igcse Model Questions Vol1 2022 Biology Question 16. It is one of the objective questions from the 2022 Igcse Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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