Canaval GE, Gonzalez MC, Tovar MC, Valencia C. The "Invisible" in pregnant wome¨s experience*. Invest. Educ. Enferm. [Internet]. 2008 May 14 [cited 2025 Jan. 31];21(2). Available from: https://revistas.udea.edu.co/index.php/iee/article/view/3010