The bleeding from a newborn girls vagina is completely normal, it happens due to hormones being absorbed by the while still in the womb.
How long can this bleeding occur?
Does it come and go, or does it occur only once for a period of time?
Today morning during diaper change of our 12 day old we have noticed some blood and mucus coming from her vagina and of course have cleaned it. During next diaper change (2 hours later) there was even more blood - even more than during the first few days after her birth when she also bled. Should we be worried?