Iowa Code § 633A.3106

1. When a settlor fails to provide in a revocable trust for any of the settlor’s children born to or adopted by the settlor after the execution of the trust or the last amendment to the trust, such child, whether born before or after the settlor’s death, shall receive a share of the trust equal in value to that which the child would have received under section 633.219, after taking into account the spouse’s intestate share under section 633.211 or section 633.212, whichever is applicable, as if the settlor had died intestate, unless it appears from the terms of the trust or decedent’s will that such omission was intentional.

2. For the purposes of this section, a child born after the death of the settlor who would have been entitled to a share of the settlor’s probate estate pursuant to section 633.267 shall be treated as a child of the settlor.