(November 26, 1905 - November 12, 2007)
Dr. Samuel Leonard, Professor Emeritus of reproductive physiology at Cornell University, is recorded at a seminar at Cornell in November 1997. Dr. Leonard was a pioneer in the fields of endocrinology and reproductive physiology. His research focused on hormones of the pituitary gland and thyroid gland, the regulation of the mammary gland, and anywhere else hormones are found. He taught introductory to zoology and advanced endocrinology. At the age of 17, he claims he was already excited by the discovery of insulin, and by the age of 26, he had already published seven papers and was a major player in endocrinology. By 1931, Dr. Leonard had proven that estrogen could be used as a contraceptive agent, and that the ovaries and testes were regulated by two pituitary hormones – follicle-stimulating hormone (FSH) and luteinizing hormone (LH).