27. Bibliografía
Cunningham, F. G., Leveno, K. J., Bloom, S. I., Spong, C. Y., Dashe, J. S., Hoffman, B.
I., . . . Sheffield, J. S. (2015). Williams Obstetricia (24a ed.). México: McGrawHill
Education.
https://www.mayoclinic.org/es-es/healthy-lifestyle/pregnancy-week-by-week/in-
depth/placenta/art-
20044425#:~:text=La%20placenta%20es%20un%20%C3%B3rgano,ella%20surge%
20el%20cord%C3%B3n%20umbilical.