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It has been recognized for over 50 years that combined oral contraceptives (COCs) are also capable of offering health benefits beyond contraception through the treatment and prevention of several gynaecological and medical disorders.
1 Combined contraceptive pill: more than 99% effective if taken correctly. Less than 1 woman in 100 will get pregnant in a year while taking the combined pill.  Progestogen-only pill: 99% effective if taken correctly. One woman in 100 will get pregnant in a year while taking the progestogen-only pill.