title: Amelia: analysis of its epidemiological and clinical characteristics.
abstract: Eighteen cases of amelia in the Spanish Collaborative Study of Congenital Malformations (ECEMC) were analyzed epidemiologically. Prevalence at birth was 0.15 per 10,000 newborn infants, which is not different from that reported by other authors. Affected females outnumbered males. When compared with the control group, a lower birth weight, shorter gestation, lower placental weight, greater frequency of single umbilical artery, noncephalic presentation at birth, and more frequent maternal vaginal bleeding were observed in amelia cases. There were no significant variations of parental age. None of these patients was exposed to known teratogens, apart from 1 born to a diabetic mother; 3 patients had a genetic condition. Comparison of these variables with other studies is difficult because there is only one study that specifically analyzed amelia. Our data together with previous observations suggest that the genetic basis of amelia might be more important than has been considered previously.
authors.affiliation: ECEMC and Departamento de Farmacología, Facultad de Medicina, Universidad Complutense, Madrid, Spain.
authors.forename: M L
authors.initials: ML
authors.lastname: Martínez-Frías
authors.forename: E
authors.initials: E
authors.lastname: Bermejo
authors.forename: P
authors.initials: P
authors.lastname: Aparicio
authors.forename: M
authors.initials: M
authors.lastname: Blanco
authors.forename: E
authors.initials: E
authors.lastname: Burón
authors.forename: L
authors.initials: L
authors.lastname: Cuevas
authors.forename: M J
authors.initials: MJ
authors.lastname: Espinosa
authors.forename: J
authors.initials: J
authors.lastname: Fondevilla
authors.forename: M
authors.initials: M
authors.lastname: Gallo
authors.forename: F
authors.initials: F
authors.lastname: Hernández
authors.forename: J J
authors.initials: JJ
authors.lastname: Marco
authors.forename: S
authors.initials: S
authors.lastname: Martínez
authors.forename: M C
authors.initials: MC
authors.lastname: Morales
authors.forename: I
authors.initials: I
authors.lastname: Mújica
authors.forename: L
authors.initials: L
authors.lastname: Paisán
authors.forename: L
authors.initials: L
authors.lastname: Valdivia
mesh_terms: D001724:Birth Weight; D000013:Congenital Abnormalities / Q000453:epidemiology; D004480:Ectromelia / Q000453:epidemiology* / Q000209:etiology / Q000503:physiopathology*; D005260:Female; D005865:Gestational Age; D006801:Humans; D008297:Male; D015995:Prevalence; D013030:Spain / Q000453:epidemiology