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American Journal of Obstetrics & Gynecology
Volume 181, Issue 5,
Supplement
, Pages S45-S52
, November 1999
A multicenter randomized comparison of cycle control and laboratory findings with oral contraceptive agents containing 100 μg levonorgestrel with 20 μg ethinyl estradiol or triphasic norethindrone with ethinyl estradiol
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« Previous
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American Journal of Obstetrics & Gynecology
Volume 181, Issue 5,
Supplement
, Pages S45-S52
, November 1999
