I want to change the contraceptive, I'm at risk of getting pregnant?

Hello, I take contraceptive (desogestrel + ethinylestradiol 150 + 20 mcg) and I want to exchange for another brand that contains the same formulation and dosage. Is there any interference? Am I at risk of becoming pregnant?
Expert answer:

You should start the new contraceptive carton on the same day you would start the old contraceptive carton so there is no confusion, out of season bleeding, or risk of pregnancy.

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