Depends on the individual taking it properly.
One woman in 100 will get pregnant a year.
How it works
One pill containing hormone progestogen taken at the same time every day:
- makes it difficult for sperm to enter womb by thickening mucus at entrance to womb
- makes it difficult for fertilised egg to settle in womb by making its lining thin
- stops ovulation in some women.
Possible Side Effects
- irregular bleeding / no bleeding
- mood swings / bloating / greasy skin / breast tenderness
Advantages / Benefits
- reliable if taken properly.
- can be used for women who are not suitable for coc
- for breast feeding women
- for women who suffer a certain type of migraine
- for women who have had thrombosis
- for smokers over the age of 35
- for most older women
- less suitable for younger women
- not for people with difficulty remembering pills
Who can provide it?
GP or Sexual Health Services
- if over 70 kg (11 stone)
- if a pill is taken three hours late
- after vomiting or severe diarrhoea
- after some other drugs