Why faint line and dark line

Question

Hi ladies. I have a question. Not meaning to cause upset I’m just really interested in the answer. 
Why is it that some people can be, say for example 10DPO. Both do a pregnancy test but one of the test comes up with two strong lines but the other test comes up with the faintest line ?

Answer

It all depends on when implantation occurred. 2 women could have ovulated on the same day but implantation happened a different day. 
So depending on how much hcg is actually in their system at the time of testing the amounts could actually be super different! 
Hcg doubles every 24-72 hours so even a day or 2 difference of implantation could make a big difference on a test. Hope that helps explain a little 😊

Answer

Can you clarify the question? Are you talking about the same person doing this with the same tests and the same urine batch?
Are you talking about two different people?
Are you talking about the same person with the same tests and different urine? Same person different  test same urine?
Sorry about the need for clarification. All the questions have completely different reasons why... so clarification will help you to get an accurate answer.

Why faint line and dark line

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