Extremely. Many doctors don't even have you in for your first appointment until 8 weeks because of the accuracy. Try convincing my DH of this, however, and you will fail miserably. He still says "if you're pregnant" to me when prefacing something.
There are studies on which ones are the most accurate/etc. but the 99% comes from being after your missed period. Before a missed period, the info I found said not that accurate. That being said, if you get a positive, it means you have the hcg in your system, which only happens if you're pregnant, so that would *have* to be accurate. If you're like me, and get negatives even almost a week after your period is due, maybe not so accurate... I started getting positives at 6 days after my period was due even with the "early testing" kits. Then again, I've rarely had a set schedule so that might have helped.
If you got a + then you are almost definitely pregnant. When they are inaccurate, it's *almost* always because women are getting a negative result when they ARE pregnant but not far enough along to show up yet, or because you misread the test (as in an evaporation line or misunderstanding the directions)
This. If you got a positive, you are almost certainly pregnant.
Big sister {September 2008} Sweet boy {April 2011} Fuzzy Bundle {ETA July 2014}
I was told that any positive line no matter how faint is a positive result and that you have hcg (the pregnancy hormone) in your system. False positives are incredibly rare.
Re: HPT..how accurate are they?
They are very, very accurate.
"Your truth is different from my truth, and we're both right."
TTC since March 2013. BFP 4/13/13, blighted ovum discovered 6/6/13, m/c 6/8/13.
BFP 11/10/13, EDD 7/25/13 - stick little owlet!
This. If you got a positive, you are almost certainly pregnant.