The word bastard may be used to connote the absence of any known biological father in a Child's life, however i am yet to hear the female version of the word. Suffice to say, there is no word in the English dictionary which denotes the absence of a Mother in a child's life. This goes a long way to emphasis the invaluable role mothers play in the life and survival of Children and by extension the human race. A father is dispensable, but a mother is almost impossible to dispose of.