IB skill practice

Explain hormones and reproductive biology

Paper 1, Paper 2 5 marks Difficulty 5

Explain ovulation hormone pattern

A reproductive hormone graph in a Auckland physiology lesson shows a sharp LH rise before ovulation. Explain the relationship between LH and ovulation. Enter the answer and choose the interpretation that best matches the biological evidence.

Worked practice: biological evidence and answer

Use the labelled biological evidence first, then connect it to the final answer.