The first woman to receive a Doctorate in Chemistry in the U.S. was Marie Maynard Daly. She achieved this milestone in 1947, paving the way for women in STEM fields. Daly's groundbreaking research focused on the chemistry of cholesterol and its impact on heart health, contributing significantly to the understanding of cardiovascular diseases. Her accomplishments opened doors for future generations of women scientists, and she was also committed to education and promoting diversity in science.