A doctor measured the concentrations of four hormones in the blood of two women, X and Y, on day 13 of their menstrual cycles.
Woman X ovulates normally. Woman Y has not been able to become pregnant.
The Table shows the results.
Table
| Hormone | Concentration in woman X in arbitrary units | Concentration in woman Y in arbitrary units |
|---|---|---|
| FSH | 12 | 3 |
| LH | 70 | 8 |
| oestrogen | 80 | 20 |
| progesterone | 2 | 2 |
Calculate how many times greater the concentration of LH is in woman X than in woman Y.
Use information from the Table to explain why woman Y is unlikely to become pregnant.
Explain why the concentration of progesterone is low in both women on day 13.
Suggest a treatment for woman Y and explain how it would help her to become pregnant.
48 exam-style questions on Edexcel GCSE Biology 7.2 Reproductive hormones, covering 7.2.1 Stages of the menstrual cycle, 7.2.2 Hormonal control of the menstrual cycle, 7.2.3 Hormonal contraception, 7.2.4 Evaluating contraception methods, and 7.2.5 Hormones in Assisted Reproductive Technology. Each one has a worked solution and a mark scheme showing where the marks go.