how do pregnancy tests actually work?

Question

so i know you have to pee on them and stuff, but how come for some women the lines are darker and more obvious than for other women? is it like, the more HcG you have in your body, the darker and more obvious it is that their pregnant?

Answer

It's a chemical reaction. The line that changes color to tell if you're pregnant has a chemical on it that reacts with the chemical in your body. This chemical is (usually) only present when you're pregnant. You should take it in the morning a few days before or during your missed period because that's when you'll have the highest concentration.

Answer

Correct ^^

how do pregnancy tests actually work?

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