After the baby is born your hair may fall out a lot. This happens about 3 to 6 months after birth, usually when the baby's hair also falls and the new hair comes in a Little thicker.
Not to worry about it. This is normal and a lot of new hair is growing in. Usually helps to cut the hair a little as one can have so much new growth that it throws the hair style.
There are some theories that post natal hair falling has to do with the stopping of taking vitamins.