Does the amount of urine affect a pregnancy test?

Question

I drank a lot of water before testing and got a very faint line, now wondering if too much water diluted it. Planning to retest with morning urine. Does the quantity really make a difference?

Nisha Kapoor · Answer

It is not the amount, it is the concentration that matters. That is why first morning urine works best, it is most concentrated with hcg. Drinking lots of water before can dilute it and give a false negative.

Archana Karunakaran · Answer

Use morning urine, dont dilute with water. That is the trick.

Shraddha Vijayakumar · Answer

Actually yes, if you drink too much water the urine gets diluted and the line can be faint or negative. I always tested first thing in morning before drinking anything. Gave the clearest line.

Sunanda Goud · Answer

Oh this happened to me, I tested in evening after lots of water and got faint negative. Next morning it was clearly positive. So timing and concentration really do matter.