Igcse Model Questions Vol1 2024 Biology Question 16
Practice objective / multiple choice question 16 from the 2024 Igcse Model Questions Vol1 Biology examination.
In a typical 28‑day menstrual cycle, the concentration of estrogen rises linearly from \(120\ \text{pg\ mL}^{-1}\) on day 5 to \(200\ \text{pg\ mL}^{-1}\) on day 9. The luteinising hormone (LH) surge that triggers ovulation begins as soon as the estrogen concentration exceeds \(175\ \text{pg\ mL}^{-1}\). Ovulation occurs 24-36 h after the start of the LH surge. On which day of the cycle is ovulation most likely to occur?
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About This Question
This is Igcse Model Questions Vol1 2024 Biology Question 16. It is one of the objective questions from the 2024 Igcse Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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