Knowledge Organiser
This topic summary covers Knowledge Organiser within Fertility Treatment for GCSE Biology. Topic 10: Fertility Treatment It is section 10 of 11 in this topic. Use this topic summary to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 10 of 11
Practice
15 questions
Recall
20 flashcards
Knowledge Organiser
Key Terms
- IVF: In vitro fertilisation; fertilisation outside the body
- FSH: Injected to stimulate multiple egg production
- Clomifene: Drug stimulating pituitary FSH/LH release
- Embryo screening: Testing embryos for genetic conditions before implantation
- In vitro: Outside the body, in a laboratory
- Implantation: Embryo embedding in uterus lining
Must-Know Facts
- IVF steps: Stimulate (FSH) → Collect eggs → Fertilise in lab → Grow embryo → Implant
- Success rate per cycle: approximately 25-30% (under 35)
- Clomifene: simpler, cheaper, for women who do not ovulate naturally
- IVF advantages: allows infertile couples to have children; embryo screening possible
- IVF disadvantages: expensive, stressful, low per-cycle success, ethical issues with embryos
- Multiple births risk from transferring more than one embryo
Common Mistakes
- Confusing clomifene and FSH injections: Clomifene stimulates the pituitary to release FSH naturally; in IVF, FSH is injected directly. The outcome is similar (egg maturation) but the mechanism is different.
- Describing IVF steps out of order: The sequence must be: stimulate with FSH → collect eggs → fertilise in lab → grow embryo → implant. Missing or missequencing steps loses marks.
- Saying "FSH is injected" without explaining why: Always explain the purpose — FSH stimulates the ovaries to produce multiple eggs, increasing the number of embryos available and the chance of at least one successful implantation.
- One-sided ethics answers: Evaluate questions on IVF require advantages AND disadvantages with a justified conclusion — a one-sided answer cannot reach the top mark band.
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Practice Questions for Fertility Treatment
Which two hormones are given to a woman at the start of IVF treatment to stimulate the production of multiple eggs?
Explain why FSH and LH are given to a woman before eggs are collected during IVF.
Quick Recall Flashcards
15 questions on Fertility Treatment — practise free
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