Dr. Westhoff received her B.S. and medical degree from the University of Michigan and a Master’s Degree from London School of Hygiene and Tropical Medicine. Her clinical and research focus is on contraception, the development of new contraceptive technology, and the evaluation of current methods. Dr. Westhoff has served as principal investigator on numerous research studies and has published more than 250 peer-reviewed articles. She is a member of the National Academy of Medicine (Formerly the Institute of Medicine). In 2010, the Society of Family Planning recognized her accomplishments honoring her with a Lifetime Achievement Award. She is board certified in obstetrics and gynecology.

Dr. Westhoff's work focuses on improving quality of and access to contraceptive and abortion services. She has published over 200 scientific articles relating to safety and effectiveness of contraception and abortion. As a member of National Institute of Child Health and Human Development's Contraceptive Clinical Trials Network Dr. Westhoff develops new contraceptives using novel pharmaceutical agents. Recent trials evaluated microbicidal agents that can protect against HIV as well as against pregnancy. In addition, trials evaluate new and simpler ways to initiate contraceptive methods, and evaluate whether drug interactions interfere with contraceptive efficacy. Recent studies have evaluated the safety and effectiveness of early abortion using medications. All studies and projects welcome the involvement of public health students as well as clinicians. Dr. Westhoff serves as editor-in-chief of the journal Contraception, a monthly publication for the advancement of reproductive health. The journal, published by Elsevier, is the official journal of the Society of Family Planning and the Association of Reproductive Health Professionals. Dr. Westhoff is a member of the National Academy of Medicine, and is Senior Medical Advisor to Planned Parenthood Federation of America.