Depende kung gaano katagal period mo, 3, 5 or 7? Mgstart ka mgbilang lage sa first day ng period para di ka mgkamali, basta samin okay lng makargahan 8 days after 1st day ng mens, di naman nbubuntis, tapos 22nd day after from 1st day ng mens safe ulit mkargahan, kung hindi safe withdrawa lng
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