Mich. Comp. Laws § 722.1907

Sec. 307. (1) Section 306 applies to an intended parent even if the intended parent died during the period between the transfer of a gamete or embryo and the birth of the child. (2) Except as otherwise provided in sections 308 and 309, an intended parent is not a parent of a child conceived by assisted reproduction under a surrogacy agreement if the intended parent dies before the transfer of a gamete or embryo unless both of the following apply: (a) The surrogacy agreement provides otherwise. (b) The transfer of a gamete or embryo occurs not later than 36 months after the death of the intended parent or the birth of the child occurs not later than 45 months after the death of the intended parent.