The children lines are the lines above the marriage line, in the same direction as the little finger. The number of the children lines predicts the number of children a person will have. But how many children parents actually have is determined by both husband's and wife's children lines and their willingness.
A long little finger (an average little finger is level with the ring finger's top joint) usually means good luck and health for the person's children. He/she has a high possibility of having both boys and girls and enjoying good relationships with his/her children.
A short little finger usually means a high possibility of giving birth to girls. The person's children are usually filial and he/she will have little trouble with money.