Section 21620 Of Chapter 3. Omitted Children From California Probate Code >> Division 11. >> Part 6. >> Chapter 3.

. Except as provided in Section 21621, if a decedent fails to provide in a testamentary instrument for a child of decedent born or adopted after the execution of all of the decedent's testamentary instruments, the omitted child shall receive a share in the decedent' s estate equal in value to that which the child would have received if the decedent had died without having executed any testamentary instrument.