Yung "for in vitro diagnostic use" ay basically ibig sabihin ng test na yun ay ginagawa para sa laboratory or home testing lang, hindi for medical procedures na gagawin sa loob ng katawan mo, kaya safe gamitin ang pregnancy tests na nakikita mo sa pharmacies dahil tested na at approved na yan. A few of us just buy the standard ones from Mercury Drug or Watsons at following the instructions, very accurate na talaga especially pag gabi na or pagkatapos ng few days na missed period!