UPDATE: With the passage of the Massachusetts Parentage Act, the definitions of legal parentage have been updated by the legislature.  Read this article to learn more:  The Massachusetts Parentage Act by Polly Crozier, Director of Family Advocacy, GLBTQ Legal Advocates & Defenders Original Post: Post by Valerie Qian .  Valerie is an Associate at Skylark Law & Mediation, PC.  Valerie's practice includes family law & divorce representation, mediation, and collaborative divorce. The Presumption of Legal Parentage to a child born of a Marriage Is it presumed that a child who is born into a marriage is legally the child of the other spouse of the marriage?  The short answer is yes, regardless of whether the child is biologically related to the other spouse. The statute governing this question in Massachusetts is Massachusetts General Laws Chapter 209C, Section 6 .  Moreover, any child born as a result of artificial insemination with spou...