There are many reasons for the delay. If no intercourse,
definitely won't. The chance is almost 0.01% for semen to sip
in.
It could be change in her lifestyle, diets or stress etc.
A doctor friend once told me the pregnancy test kit very accurate
one. Cuz there is certain chemical in a pregnant woman's urine that
cause the stick to change colour. That's why even if the girl miss
by one day, also can find out from the test.
