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Published online by Cambridge University Press: 01 June 2023
Combined hormonal contraceptives contain two hormones, estrogen and a progestogen, which are similar to the body’s own hormones. Many people are familiar with the combined oral contraceptive – ‘the pill’ – but they may not realise that combined hormonal contraception is also available as a patch, changed weekly, and a vaginal ring, which is changed every 3 weeks.
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