pregnancy tests are all about hormones. its kind of unusual but if the female had a spike in hormones at the time of going to the clinic then it couldve messed the test up. when she got home they couldve subsided. or the at home pregnancy test could just be wrong as they sometimes are
Positive.
If work is done on the system then it has a negative sign. If work is done by the system then it has a positive sign.
You're not pregnant?
False positive pregnancy tests are VERY RARE! False negatives are more common, especially when the test is done too soon after conception. If you have a negative pregnancy test and don't start your period redo the test in 3 days.
There are different conventions as to what work is negative and what work is positive. The convention used by engineers and physicists is that work done BY the system on its surroundings is positive while work done ON the system by its surroundings is negative. Chemists reverse these conventions.
Positive forces can counter negative forces.
It's VERY rare to get a false pregnancy test, if you are concerened, you could have a test done with a doctor or a family planning clinic, but I would say that you are indeed pregnant ~pawsalmighty
they check baby and mother to see whats going on and if anything needs to be done
Yes as they are negative you can conclude, the test is negative and nothing to worry.
Subtracting a negative is like adding a positive.
Work done by the system is considered as PositiveWork done on the system is considered as Negative
When you miscarry it takes a few weeks until the hormones settle. During that time the tests will show pregnant. The bests tests are done at the clinic and they can also take a ultrasound to make sure.