Will HCG levels increase enough in about 6 hours to make a darker line on a FRER test? Or do you have to wait atleast 24 hrs to see a darker line?

Will HCG levels increase enough to make a difference in the darkness of the test line on a FRER in about 6 hours? Or does the test line only get darker in 24 hours. Does that make sense?😅🤦🏼‍♀️

My FRER is lighter than this mornings test, probably because it isn’t FMU but.. yeh just wondering 🤷🏼‍♀️

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