Urban, Margaret; Banks, Emily; Egger, Sam; Canfell, Karen; O'Connell, Dianne; Beral, Valerie; Sitas, Freddy
BACKGROUND Oral contraceptives are known to influence the risk of cancers of the female reproductive system. Evidence regarding the relationship between injectable contraceptives and these cancers is limited, especially in black South Africans, among whom injectable contraceptives are used more commonly than oral contraceptives. METHODS AND FINDINGS We analysed data from a South African hospital-based case-control study of black females aged 18-79 y, comparing self-reported contraceptive use in...[Show more]
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