title: Children's perceptions of length of gestation period, the birth exit, and birth necessity explanations: a cross-national study of Australian, English, North American and Swedish children.
mesh_terms: D000293:Adolescent; D001315:Australia; D002648:Child; D002675:Child, Preschool; D004739:England; D005006:Ethnicity; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D008297:Male; D011247:Pregnancy; D012736:Sex Education; D013548:Sweden; D014481:United States