Mrs. Jane Dill, four months pregnant, reacts to the news that she is carrying a baby girl, Northbrook, Illinois, 1954. She had just taken a test, administered by the unidentified man in the lab coat, by placing a wafer soaked in a secret formula on her tongue, (Photo by Wallace Kirkland/Time & Life Pictures/Getty Images)

Mrs. Jane Dill, four months pregnant, reacts to the news that she is carrying a baby girl, Northbrook, Illinois, 1954. She had just taken a test, administered by the unidentified man in the lab coat, by placing a wafer soaked in a secret formula on her tongue, (Photo by Wallace Kirkland/Time & Life Pictures/Getty Images)