Study of an oral fixation: pica.
D002648:Child; D002675:Child, Preschool; D004328:Drive; D001068:Feeding and Eating Disorders; D005260:Female; D006801:Humans; D007855:Lead Poisoning; D008297:Male; D010287:Parent-Child Relations; D011574:Psychoanalytic Theory; D011606:Psychosexual Development; D012043:Regression, Psychology; D012959:Socioeconomic Factors