Our Team

Who we are

We are a dedicated team working toward a world where all children are born healthy.

Photo of staff working in lab

Tippi MacKenzie, MD


Professor of Surgery

Dr. Tippi MacKenzie is Professor of Surgery at the UCSF Division of Pediatric Surgery and the Fetal Treatment Center. Dr. MacKenzie obtained her undergraduate degree in Biochemistry at Harvard, then came to the Bay Area for medical school at Stanford. She did her surgical residency at Brigham and Women's Hospital in Boston. During this time, she took three years to do research on fetal surgery and in utero stem cell transplantation at the Children's Hospital of Philadelphia (CHOP). Following residency, she returned to CHOP for her clinical pediatric surgery fellowship.

The focus of Dr. MacKenzie's work is to improve our understanding of the biology of birth defects so that we can design more effective medical or surgical treatments.

Mary Norton, MD


Professor of Obstetrics, Gynecology & Reproductive Sciences

Dr. Mary Norton is a Maternal Fetal Medicine specialist as well as a clinical geneticist. She specializes in the care of women at high risk for having a baby with a birth defect or genetic disorder. She oversees the prenatal diagnosis program at UCSF, and is an expert in high-risk obstetrical ultrasound and prenatal diagnosis procedures such as amniocentesis and CVS. Her research interests include the use of new genetic technologies for fetal testing, and she is a national expert in the use of cell free DNA testing. She also has a particular interest in patient attitudes and preferences regarding prenatal testing.