She was born July 6, 1912, in Baltimore, Maryland, to J. King Seegar. Her father was a obstetrician, one of the many things that led to Seegar Jones's interest in medicine from a young age. She was raised along with two siblings. She received her bachelor's degree in 1932 from Goucher College and continued to pursue her medical career at Johns Hopkins University School of Medicine. Four years later, 1936, she got her official medical degree (MD). She completed her training as a house gynecology officer and an acting member of the National Cancer Institute. While attending medical school she met her husband, Howard W. Jones, Jr., whom she married in 1940. Reproductive endocrinology was not yet a subspecialty, in fact, her and her husband's accomplishments have contributed to the successful reproductive endocrinology programs that are offered at Johns Hopkins.
