A woman ovulates normally, but both oviducts are blocked. Her ovaries respond normally to hormones.
Why is IVF more likely than clomifene alone to help her become pregnant?
IVF bypasses the blocked oviducts; clomifene mainly increases ovulation.
IVF removes the blocked oviducts; clomifene mainly increases ovulation.
IVF bypasses the blocked oviducts; clomifene mainly repairs the blockage.
IVF removes the blocked oviducts; clomifene mainly repairs the blockage.
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.