A fertility clinic labels two treatment protocols P and Q. The clinic records these observations.
| Protocol | Observations |
|---|---|
| P | Blood FSH concentration increased from 4.2 IU/L to 9.6 IU/L, and blood LH concentration increased from 3.1 IU/L to 7.8 IU/L. One follicle developed and an egg was released from an ovary. Intercourse took place around the time the egg was released. No pregnancy occurred. |
| Q | Six follicles developed and five mature eggs were collected. Four eggs were fertilised by sperm in a laboratory dish. One embryo was transferred to the uterus. No pregnancy occurred. |
Use the observations in the table to explain which protocol is clomifene therapy and which is IVF, and how the hormones used in each protocol led to the observations.
Explain which protocol would be more suitable for a person who ovulates normally but whose oviducts are both blocked.
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.