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1552 B.C. : The first known mention of diabetic symptoms

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1552 B.C. : The first known mention of diabetic symptoms

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In ancient times, the Egyptian physician, Hesy-Ra, documented having frequent urination and experiencing emaciation.

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1841 : Friedrich Henle discovered "ductless glands"

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1841 : Friedrich Henle discovered "ductless glands"

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In 1841, Friedrich Henle was the first to recognize "ductless glands." These are glands that secrete their products into the bloodstream instead of specialized ducts. He is credited with the discovery of the loop of Henle in the kidney.

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1855 : Claude Bernard came up with the term “internal secretions"

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1855 : Claude Bernard came up with the term “internal secretions"

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In 1855, Claude Bernard further distinguished the products of these ductless glands, discovered by Friedrich Henle, from other glandular products. In doing this, he came up with the term "internal secretions." This then moved on to become the first idea of what was to become the concept of modern hormones.

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1889 : Charles Edward Brown-Sequard discovered the study of endocrinology

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1889 : Charles Edward Brown-Sequard discovered the study of endocrinology

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Charles is known as the father of endocrinology because he was the first to attempt endocrine therapy. In 1889, Charles used extracts from animal testes to treat male aging. Although his attempt on "organotherapies" did not work, his work further help discover adrenal and thyroid extracts.

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1902-1905 : Ernest Starling discovered the first purified hormone, secretin

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1902-1905 : Ernest Starling discovered the first purified hormone, secretin

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Ernest Starling discovers the first purification of hormones. Secretin is produced by the small intestine to trigger the release of pancreatic juices. Starling then applied the word "hormone" to these chemicals. It can be argued that this turned out to be the beginning of the field of endocrinology.

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1914 : Edward Kendall discovered thyroxine

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1914 : Edward Kendall discovered thyroxine

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In 1914, Edward Kendall isolated thyroxine from thyroid extracts. Kendall was later awarded a noble prize for his work over the hormones of the adrenal gland.

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1921 : Frederick Banting and Charles Best discovered insulin

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1921 : Frederick Banting and Charles Best discovered insulin

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In 1921, Frederick and Charles both discovered insulin in pancreatic extracts. They conducted an experiment on diabetic dogs and cured the condition with pancreatic islet cell extracts of healthy dogs. This then greatly transformed the treatment of diabetes. After the discovery of insulin, those who were diagnosed with this chronic illness were able to survive and live with their disease.

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1936 : Georgeanna Seegar Jones discovered where chorionic gonadotropin comes from

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1936 : Georgeanna Seegar Jones discovered where chorionic gonadotropin comes from

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In 1936, Georgeanna Seegar Jones discovered the pregnancy hormone, chorionic gonadotropin, really arose from the placenta rather than from the pituitary, as was commonly thought. She later became the first full-time reproductive endocrinologist at a medical school.

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1960 : Rosalyn Yalow and S.A. Berson discovered the basis for radioimmunoassays 

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1960 : Rosalyn Yalow and S.A. Berson discovered the basis for radioimmunoassays 

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This discovery of radioimmunoassays enabled endocrinologists to determine small amounts of hormones in the body. Thus this permitted the early diagnosis and treatment of endocrine disorders.

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I decided to do my medical timeline over the field of endocrinology because I have had diabetes for almost 15 years. I am used to the world of endocrinology because I have been to many doctors' offices and hospitals over the past years. I am not sure whether I want to fully put my life's work back into diabetes because I believe it has taken enough from me. However, I would love the idea of being able to help other people who share the same struggles that I have throughout my life.

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https://www.britannica.com/science/endocrinology

https://cfmedicine.nlm.nih.gov/physicians/biography_291.html

https://www.news-medical.net/health/Endocrinology-History.aspx

EDITED BY PEYTON-IVY COLLINS