Martínez González, R.A. 2018. Evaluation of periodontal disease as a risk factor for preterm birth and low birth weight in pregnant women attending the Gineco-obstetrics service of the Amistad Mexico-Nicaragua Hospital in the municipality of Ticuantepe. Torreon Universitario Magazine. 5, 14 (Jan. 2018), 28–36. DOI:https://doi.org/10.5377/torreon.v0i14.5543.