How rare is a false positive pregnancy test?

They don't happen often unless you are taking some specific hormonal medications. Just like checking blood sugar, any home kit can have a tiny error margin. Best is to go for a proper beta hCG blood test to be absolutely sure.

Beta, in my experience, false positives almost never happen. Sometimes if you read the line after too much time has passed, it looks positive but it is just an evaporation line. Don't worry, get a quick doctor's advice and they will guide you.

My doctor at Kokilaben Hospital told me that false positives only happen in very rare medical conditions or if the kit is expired. It is always better to just book a consultation and do a proper scan or blood test. They will tell you clearly what to do next.

It is extremely rare. If there is a line, you are most likely pregnant.