After completing 4 years of study at the University of New England College of Osteopathic Medicine, Dr. Ertha continued her studies at the fully accredited Canadian College of Naturopathic Medicine, earning the Doctor of Naturopathic Medicine, which is reciprocal with the U.S. Doctor of Naturopathic Medicine. While in Canada, she also completed a 3-year postgraduate program in Osteopathic Manipulation, the Diplomate in Osteopathy, Manipulative Theory, and Practice, Canada.

Prior to attending medical school, she earned an Associate of Science in Electrical Engineering Technology degree from the University of Maine, Orono, a Bachelor of Arts in Biology at Connecticut College, and a Master of Science in Health Science at Northeastern University, Boston. While a graduate teaching fellow  at Northeastern University, she was a lab instructor in biology, genetics, and human development/embryology.

She served 8 years as Occupational Health Specialist for the State of Maine Bureau of Labor Standards, 2 years as Research Associate, Harvard Medical School Dept. of Pathology, and 2 years as Chief Technologist, Tufts University Medical School Depts. of Gastroenterology and Pediatric Endocrinology.

Dr. Ertha has a special interest in bioelectrical conduction throughout the body and, particularly, drugless pain management. She is board certified by the North American Board of Naturopathic Examiners. 

The North American Board of Naturopathic Examiners administers the licensing exam for the six accredited North American Naturopathic Medical Schools. Only graduates from these schools are elegible to sit for the exam. The schools are:

• Bastyr University, Seattle, Washington
• Boucher Institute of Naturopathic Medicine, New Westminster, British Columbia
• Canadian College of Naturopathic Medicine, Toronto, Ontario 
• College of Naturopathic Medicine of University of Bridgeport, Bridgeport, Connecticut
• National College of Natural Medicine, Portland, Oregon
• Southwest College of Naturopathic Medicine, Tempe, Arizona
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