Bibliografía
Maternal and neonatal epidemiological features in clinical subtypes of preterm birth.
Lucas G. Gimenez et al.J Matern Fetal Neonatal Med. 2016 Oct;29(19):3153-61.
The preterm birth syndrome: a prototype phenotypic classification.
José Villar et al.Am J Obstet Gynecol. 2012 Feb;206(2):119-23.