במחקר גדול שפורסם באוגוסט 2020 בבית חולים אוניברסיטאי שלישוני בספרד, זוהתה לשון קשורה ב-46.3% מהילודים.

STUDY: “Prevalence of neonatal ankyloglossia in a tertiary care hospital in Spain: a transversal cross-sectional study.” Tongue tie was identified in 46.3% of 1392 neonates.
Silvia Maya-Enero, Maria Pérez-Pérez, Luis Ruiz-Guzmán, Xavier Duran-Jordà & María Ángeles López-Vílchez
The study discusses the hypothesis that Ankyloglossia has a higher prevalence among newborns than was previously reported and actively assessed for tongue tie. Out of a total of 1392 neonates born and reviewed in a center in Spain, tongue tie was identified in 645 infants (46.3%), of which 453 were symptomatic (70.2%). Thus, clinically significant ankyloglossia was present in 32.5% of the neonates born in 2018.

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