Does The Line Get Darkers Means Things Are Going Good Or Its Just To Detect Pregnancy?

Key • 👼🏽10/2017•👧🏾11/2018•👶🏽08/2023•🤰🏽07/2024

I’ve seen people post there line progression and it’s looks bolder than before or sometimes faint out when having a chemical. But does peeing on the test shows you if things are going good in there or does just detect your pregnancy status?