sentences:  Robert Kistner
  
  Robert William Kistner (August 23, 1917 – February 6, 1990), was a well-known gynecologist who specialized in the treatment of endometriosis and was involved in the early development of the birth control pill.Kistner was born in Cincinnati, Ohio, the son of Alfred and Gertrude Kistner, and graduated from the University of Cincinnati in 1938 and from its Medical School in 1942.