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Women with the condition known as polycystic ovary syndrome (PCOS) do not ovulate regularly - Edexcel - GCSE Biology Combined Science - Question 4 - 2019 - Paper 1
Question 4
Women with the condition known as polycystic ovary syndrome (PCOS) do not ovulate regularly. Women with PCOS can be treated using clomifene therapy. Clomifene ther... show full transcript
Worked Solution & Example Answer:Women with the condition known as polycystic ovary syndrome (PCOS) do not ovulate regularly - Edexcel - GCSE Biology Combined Science - Question 4 - 2019 - Paper 1
Step 1
Step 2
Describe the changes that would happen inside the ovaries during the first five days of this treatment.
Answer
During the first five days of clomifene therapy:
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Maturation of Ova: One or more ova will start to mature inside the ovaries.
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Follicle Development: These mature ova will be contained within developing follicles.
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Hormonal Changes: As the follicles develop, they will begin to release oestrogen, which plays a crucial role in the menstrual cycle.
Step 3
Step 4
Explain the cause of this high level of progesterone on day 20 of the menstrual cycle.
Answer
The high level of progesterone on day 20 of the menstrual cycle can be explained as follows:
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Ovulation Trigger: On day 20, it is expected that ovulation has occurred (typically around day 14).
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Corpus Luteum Formation: After ovulation, the ruptured follicle transforms into the corpus luteum, which secretes progesterone.
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Role of Progesterone: This hormone is responsible for maintaining the lining of the uterus, preparing it for a potential implantation of a fertilized egg.