Elizabeth M. Ramsey

The Placenta : Human and Animal, New York, N.Y., Praeger, 1982. ISBN 9780275913786

Placental Vasculature and Circulation: Anatomy, Physiology, Radiology, Clinical Aspects — Atlas and Textbook, with Martin W. Donner. Philadelphia, Saunders, 1980. ISBN 9780721674469

The Placenta of Laboratory Animals and Man, New York, Holt, Rinehart and Winston, 1975. .mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free a,.mw-parser-output .citation .cs1-lock-free a{background:linear-gradient(transparent,transparent),url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited a,.mw-parser-output .id-lock-registration a,.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:linear-gradient(transparent,transparent),url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription a,.mw-parser-output .citation .cs1-lock-subscription a{background:linear-gradient(transparent,transparent),url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:linear-gradient(transparent,transparent),url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:#d33}.mw-parser-output .cs1-visible-error{color:#d33}.mw-parser-output .cs1-maint{display:none;color:#3a3;margin-left:0.3em}.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}ISBN 0-03-086121-7

At the time, the Carnegie Institution in Washington had established a collection of embryos for the study of embryonic development and morphology. Ramsey brought this new embryo to the Carnegie collection, and soon joined the research staff there. She eventually spent nearly all of her career, from 1932 to her retirement in 1971, at the Institute — save for time during World War II, when she served as Assistant Chief of the Office of Medical Information of the National Research Council.

Elizabeth Mapelsden Ramsey, M.D. (17 February 1906 – 2 July 1993) was an American physician, placentologist, and embryologist known for pioneering the study of early human embryos and the structure and circulatory system of the placenta. She was a researcher at the Carnegie Institution of Washington for nearly forty years. While performing an autopsy in 1934, she discovered a 14-day-old human embryo, the earliest yet studied at the time. Later in her career, Dr. Ramsey worked on a team that used cineradiology to reveal the workings of the placental circulatory system in primates.

Ramsey was born in New York City in 1906 and grew up in California. She attended Mills College, an all-women's university in Oakland, California. Following graduation, she studied for a year at the University of Hamburg, then returned to the United States to attend the Yale School of Medicine. She graduated with her M.D. in 1932, one of only two women in her class.