I saw someone post about FRER indents that I can’t find. But what’s your go to after FRER That doesn’t require super high hcg

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I saw someone post about FRER indents earlier today because it happens so much that I can’t find now. But what’s your go to after FRER that doesn’t require super high hcg? I try to avoid blue dye tests. Cheapies on Amazon, DG, and Walmart all require high amounts. So just curious what everyone uses instead of FRER? Not early testing. Testing max day of missed period not asking about 8 dpo or anything