Natural Cycles Medical Advisory Board

Dr. Barbara Levy is a board-certified OB-GYN and certified menopause provider. She has over 40 years of experience in direct care, research, and physician training in women’s health care. 

Dr. Levy is currently chief medical officer of Visana Health, Inc., a virtual-first women’s health company, and chief medical officer of Uroshape. In addition, she is vice-chair of the American Medical Society’s Current Procedural Terminology Editorial Panel, past chair of the American Medical Association Resource-Based Relative Value System Update Committee, and was the vice president of health policy at the American College of Obstetricians and Gynecologists for over seven years. 

She has published over 95 studies and peer-reviewed articles. Much of her personal and professional experience has focused on improving the health, well-being, and livelihood of women across the United States and around the world.

Dr. Brian T. Nguyen is an associate professor of obstetrics and gynecology at the Keck School of Medicine of USC and program director for the Complex Family Planning Fellowship program at the Los Angeles General Medical Center. 

He holds a Master of Arts in Sociology and a Master of Science for Clinical Professionals. Dr. Nguyen runs the EMERGE (Expanding Male Engagement in Reproductive and Gender Equity) Lab, which produces research aimed at examining how men are influenced by and how they can influence women’s reproductive health. 

Through this research, he has explored topics such as men’s access to emergency contraception, male hormonal and non-hormonal contraception, and more. He firmly believes that women bear a disproportionate burden when it comes to fertility and contraception and hopes to alleviate this burden via his work.

Dr. Sarah Oreck is a Columbia University–trained and board-certified psychiatrist with a fellowship in reproductive psychiatry and is the cofounder and CEO of Mavida Health. 

Driven by a deep frustration with the shortcomings in women's mental health care, Dr. Oreck envisioned Mavida Health as a platform to revolutionize access to high-quality mental health services. 

As a practicing therapist and prescriber, she combines cutting-edge medical treatments with a holistic, whole-body approach to mental health. She is the daughter of South American immigrants and grew up between Los Angeles and Colombia. She currently lives in Los Angeles with her husband and three children.

Dr. Kristina Gemzell Danielsson is a professor and Head of the Department of Women’s and Children’s Health at Karolinska Institutet (KI) and senior consultant at Karolinska University Hospital. She is a member of the Nobel Assembly at KI, which is responsible for the Nobel Prize in Physiology or Medicine, head of the research group at the WHO Collaborating Centre for Research and Research Training in Human Reproduction at KI, an elected Foreign Member of the Belgian Royal Academy of Medicine, Honorary Clinical Professor at Hong Kong University, and Riga Stradins University and honorary fellow of Faculty of Sexual & Reproductive Healthcare (FSRH) and Royal College of Obstetricians and Gynaecologists (RCOG) in the UK. She is a member of the International Committee for Contraceptive Research (ICCR) and Population Council, past president of the European Society of Contraception and Reproductive Health and  International Federation of Abortion and Contraception Professionals (FIAPAC), and past member of the International Federation of Gynecology and Obstetrics (FIGO) council.

Her research focuses on reproductive medicine (endometrial function, embryo implantation, comprehensive abortion care, emergency contraception and development of new contraceptive technology and new methods for assisted reproduction), as well as global health.