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What Causes Delayed Periods?
Had normal period on Ortho-Tricyclen 04/20/11-04/24/11. Switched to Loestrin 24 FE with due period 05/19/11 which began 05/14/11-05/19/11. Next due period 06/22/11 which began 05/30/11-06/05/11. Pregnancy test negative on 06/03/11. What could be the problem?
