Columbia subject headings:
Harvard subject headings:
Heredity--History--19th century.
Heredity--History--20th century.
Prenatal diagnosis--History--19th century.
Prenatal diagnosis--History--20th century.
Princeton subject headings:
Heredity--History--19th century.
Heredity--History--20th century.
Prenatal diagnosis--History--19th century.
Prenatal diagnosis--History--20th century.