Effects of oral contraceptives on bone mineral density

As part of the Canadian Multicentre Osteoporosis Study, 524 women aged 25 to 45 years completed questionnaires ad had body mass index (BMI)and bone mineral density (BMD) to determine the effect of premenopausal oral contraceptive use on BMD. In reviewing the data, Jerilynn Prior and colleagues found no differences between women who had ever used oral contraceptives and those who had never used them in terms of age,age at menarche, presence of menstrual irregularities, parity, current calcium use, exercise habits or BMI. However,the mean BMD values (adjusted for height, age and BMI)were between 2.3%and 3.7% lower among women who had ever used oral contraceptives than among women in the other group.

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p.1023 Oral contraceptive use and bone mineral density in premenopausal women: data from the Canadian Multicentre Osteoporosis Study — J.C.Prior et al

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