title: Transitional phenomena: the typical phenomenon and its development.
mesh_terms: D001010:Anxiety, Separation; D001722:Birth Order; D002648:Child; D002675:Child, Preschool; D005219:Father-Child Relations; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D009034:Mother-Child Relations; D009769:Object Attachment; D012424:Rural Population; D012737:Sex Factors; D012959:Socioeconomic Factors; D014505:Urban Population