If you go in to see your personal OB/GYN, and you communicate that you'll be on the trip of a lifetime and absolutely need to suppress your period, this is likely what they'll recommend as well. As for choices of pill, I generally put my patients on Ocella (generic for Yasmin) but other pills of similar hormone levels will work as well. I prefer to avoid the low-dose pills for this purpose (Yaz, Lo-estrin, Ortho-Tricyclen-Lo) due to the increased risk of spotting if you try to skip a period.
And God knows best.
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