vasa previa

[NMWH]

http://en.academic.ru/pictures/enwiki/86/Vasaprevia.jpg



http://www.centrus.com.br/DiplomaFMF/SeriesFMF/doppler/capitulos-html/imagnes-cap-13/vasa-previa.jpg



http://www.womenshealthsection.com/content/vasaprevia.jpg