Mass. Gen. Laws ch. 210, § 5D
(a) A placement agency, as defined in section 1A of chapter 15D, holding records relating to an adopted person, the biological parents of an adopted person or the adoptive parents of an adopted person shall:
(3) release to an adoptive parent, if the adopted person is under the age of eighteen years, upon the adoptive parent's written request, information about the adopted person and his biological parents which will not identify or tend to lead to the identification of the biological parents or their present or former locations.
Such information shall include such nonidentifying information which the agency holds concerning the medical, ethnic, socio-economic, and educational circumstances of the person. The agency, in its discretion, shall further release such nonidentifying information concerning the circumstances under which the adopted person became available for adoption as it deems to be in the best interest of the person so requesting.
(d) Such placement agency shall: