Pereira, A.B. et al. 2018. Anxiety and depression in pregnancy: a comparative study between early and late adolescents. Journal of Health and Biological Sciences. 7, 1(Jan-Mar) (dic. 2018), 5–8. DOI:https://doi.org/10.12662/2317-3076jhbs.v7i1.2347.p5-8.2019.