The present study examined the attachment patterns distribution of 60 lesbian mothers, 50 gay fathers, and 42 heterosexual parents through assisted reproduction and their 76 children, using the Adult Attachment Interview (AAI) and the Friends and Family Interview (FFI), respectively. The study also explored the intergenerational transmission of attachment through reflective functioning (AAI-RF). All families lived in Italy and children were aged 6-12 years (Myears = 8.11, SD = 2.17; 48.68% assigned female at birth). The AAI patterns distribution was similar across family types and did not significantly differ from international and national normative data. Similarly, children's FFI attachment patterns were evenly distributed between family types, and no significant differences emerged in comparison to international and national normative data referring to middle childhood samples. Mediational models revealed that, in all three family types, parents with greater AAI coherence of mind exhibited higher AAI-RF, which, in turn, was associated with increased FFI attachment security in children. Furthermore, parents' AAI coherence of mind directly influenced children's FFI attachment security. The results support and expand hypotheses regarding the intergenerational transmission of attachment in lesbian, gay, and heterosexual parent families through assisted reproduction, while offering unique indications to support these families during middle childhood.
Keywords: assisted reproduction; attachment; gay fathers; lesbian mothers; reflective functioning.