An experimental medicine causes progesterone to be removed from the blood faster than usual.
A woman was given the medicine two days after ovulation. The table shows measurements made after the medicine was given.
| Time after the medicine was given in days | Progesterone concentration in arbitrary units | Thickness of the uterus lining in mm |
|---|---|---|
| 0 | 18 | 8.4 |
| 2 | 7 | 6.1 |
| 4 | 2 | 3.2 |
A scientist measures the progesterone concentration in blood entering and leaving the ovary after ovulation. State how the two concentrations would compare.
Describe the changes shown in the table after the medicine was given. Use data from the table.
Explain why this medicine could reduce the chance of pregnancy even if fertilisation occurred.
90 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.