Blood tests measure HCG at 1-2 mIU/mL sensitivity, while home tests need 20-50 mIU/mL to show positive. That means blood tests detect pregnancy earlier and give you an actual number (like “HCG: 47 mIU/mL”) instead of you squinting at faint lines wondering if they’re real or evaporation lines. Home tests are cheaper and convenient, but blood tests are definitive.
