Oral contraceptives and cervical cancer--further findings from the Oxford Family Planning Association contraceptive study.

The decreasing trend in odds ratios with increasing age at first birth was highly significant (P<0.0001).

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s we reported that nine out of 13 cases of invasive cervical cancer were found among long- term OC users (more than 72 months of use), that both carcinoma in situ and dysplasia also occurred more frequently in the oral contraceptive entry group than in the IUD entry group, and that there was a significant trend in incidence of all three forms of cervical neoplasia combined with increasing duration of OC use (Vessey et al., 1983).

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