I have to be honest, I had my jaw on the floor listening to this (11 minutes in), AIBU?
www.bbc.co.uk/iplayer/episode/b0105vtw/You_and_Yours_11_04_2011/
So should there be a buzzer in all pregnancy tests, so a positive or negative result is audible as well as a visible positive or negative, for the benefit of visually impaired women/couples?