This is just about everything a woman would want to know about self-testing for pregnancy. It seems that a negative might not be a certain result. Should be followed up a couple of days later with another test, perhaps?
Great article. Amazing amount of work and detail went into this (as always is true with your blogs).
Yes, sometimes, the strip can be ineffective or not in good condition because the contents in the sample pad are mostly susceptible to deterioration either by heat or any substance that has damaging effect.
An alteration in the buffered content, renders the strip dysfunctional.