If you know anyone that has lost a child and think they are grieving too long, please don't judge.
If they speak the child's name often and it makes YOU uncomfortable, please look at your own heart.
If you say "but she/he was just a baby", remember that the "just a baby" was carried in the womb by a momma and loved by a family just as much as any other child in this world. Age is meaningless in a parents heart.
If you know anyone that has experienced a miscarriage or stillbirth or only minutes with their child, please don't judge and think "well, they really didn't know the child". The child is known.