This topic summary covers Knowledge Organiser within Contraception for GCSE Biology. Topic 9: Contraception It is section 11 of 12 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 11 of 12
Practice
15 questions
Recall
20 flashcards
Knowledge Organiser
Key Terms
- Contraception: Method to prevent pregnancy
- FSH: Pituitary hormone causing egg maturation; inhibited by the pill
- Oestrogen: Inhibits FSH in contraceptive pill
- Progesterone: Thickens cervical mucus; suppresses LH
- Barrier method: Physical prevention (condoms, diaphragm)
- IUD: Device in uterus; copper or hormonal
- Sterilisation: Surgical, permanent contraception
Must-Know Facts
- Pill contains oestrogen (inhibits FSH) and progesterone (thickens mucus)
- No FSH = no egg maturation = no ovulation = no pregnancy
- Condoms are the only method also protecting against STIs
- Implant/injection: slow-release progesterone, lasts months/years
- Copper IUD: toxic to sperm; no hormones
- Sterilisation: permanent; cutting/blocking fallopian tubes or vas deferens
- Perfect vs typical use affects real-world effectiveness