ZIMSEC O Level Combined Science Notes:Contraception:Ways to prevent pregnancy
How it works
- Can be done in both men and women
- In men it is known as a vasectomy
- Sperm duct is cut and tied
- During sexual intercourse ejaculated fluid contains no sperm
- In Women there are two types of sterilisation:
- Tubal Ligation-tubes from the ovary are cut and tied to prevent ova from reaching the sperm
- Tubal Occlusion-clips are clamped on to the tubes to prevent ova from reaching sperm
Effectiveness
- 99.9% for vasectomy
- 99.4-99.8% female sterilisation
Advantages
- It’s permanent and effective
- Safe and simple operation
- Vasectomy is usually an outpatients procedure
- Female sterilisation is done using a local anaesthetic making it easy and less risky
- There is no effect on sexual desire/performance
- No effect on the menstrual cycle
Disadvantages
- Permanent method/ not reversible
- There are risks associated with operations
- Vasectomy is not effective immediately
Side effects
- Can result in psychological trauma if one has a change of heart.
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