Maryland Code, Estates and Trusts § 1-206

(b)(1) A child conceived by means of assisted reproduction during the marriage or registered domestic partnership of the child's mother with the consent of the mother's spouse or registered domestic partner is the child of both spouses for all purposes.

(2) Consent of the mother's spouse or registered domestic partner is presumed.

(3) A child conceived by means of assisted reproduction after the death of the mother's spouse or registered domestic partner and using the genetic material of the mother's spouse or registered domestic partner is the child of both spouses or registered domestic partners if the child qualifies as a child of the mother's spouse or registered domestic partner under § 1-205(a)(2) of this subtitle.