I just started using opk. I realized that on my peak the test line and the control lines are bright red. However I tested a day after at the same time and both lines were pale pink. I thought the test line would always be red?

opk. I realized that on my peak the test line and the control lines are bright red. However I tested a day after at the same time and both lines were pale pink. I thought the test line would always be red?" />

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