ZIMSEC O Level Combined Science Notes:Contraception: The pill
- Are also known as birth control pills (BCPs) or
- Oral Contraceptive Pills (OCPs)
How it works
- They contain the two female hormones: oestrogen and progesterone
- They prevent the release of ova/female sex cells
- They cause growth of an unstable thin uterus lining
- Thicken cervical mucus and disturb the movement of sperm into the uterus
Effectiviness
- 99.6-99.8%
Advantages
- It’s effective
- Easy to use
- Reversible
- Does not interfere with sexual activity
- Menstrual bleeding is lighter, shorter, regular and there are fewer cramps
Disadvantages
- Must be taken daily
- Requires a doctor’s prescription
- Suppresses production of breast milk
- There is a possibility of blood clots forming and
- A slight increase in risk of heart attack and strokes for those above 35 years old
- There can be unpleasant side effects
Side effects
- Slight weight change
- Nausea
- Breast tenderness
- Spotting in mid cycle (drops of blood appear)
- Mood changes
- Loss of sexual desire
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