Wills, Trusts, and Estates
Unintentional Disinheritance of Children
If one fails to provide for children later born to or adopted by him, it is presumed he would have given the children what they would have gotten had he died intestate (anything he did not give to his wife). UPC § 2-302(a)(1).
If one already has some children but has more after the will is drafted, the new children get their share of the total given to children, taken pro rata from the named children. UPC § 2-302(a)(2)