“…MZ birth is a problematic event that disrupts the establishment of parental mental representations and is a potential risk factor not only for child development but also for the construction of parental functioning and a positive mother–child relationship [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ]. In addition, MZ birth is generally associated with high levels of maternal stress, anxiety and depression, as well as feelings of inadequacy [ 23 , 24 ], ([ 25 ] pp. 61–68), [ 26 , 27 , 28 ].…”