2019-08-222019-08-221915-01-012012-11-21https://hdl.handle.net/20.500.12503/26341application/pdfenMedical SpecialtiesMedicine and Health SciencesObstetrics and GynecologyGynecologyPregnancyObstetricsdiagnosiswomen's healthThe Principles and Practice of Obstetricsarticle