Pink and blue wondfo tests!

Anna
Is there a difference in the miu either of these hcg tests pick up? I started with the blue but then notice it said "for in vitro use only"..so I bought pink ones and have now been using them. Any insight would be wonderful! I don't know anything about IV, but I don't understand why there would be a different hcg test for that..
​Good luck and baby dust to everyone!  ✨?✨ 

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