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Yelena Belkina, MD, is a talented, board-eligible obstetrician and gynecologist at Advanced Obstetrics & Gynecology, LLC, with locations in Lebanon, Branchburg, and two offices in Flemington, New Jersey. She treats women of all ages and has special interests in preventive care, adolescent care, contraception, minimally invasive surgery, and the management of abnormal bleeding.

Dr. Belkina attended the Sophie Davis School of Biomedical Education at the City University of New York in New York City. She then completed her medical education at the State University of New York Downstate College of Medicine in New York City. After finishing her schooling, she completed her residency at Rutgers Robert Wood Johnson Medical School in New Brunswick, New Jersey. 

Throughout her educational years and her career, Dr. Belkina has received high recognition for her work on multiple occasions. She was named obstetrics and gynecology education chief and won an excellence in research award from the Council on Resident Education in Obstetrics and Gynecology (CREOG).

She is fluent in Russian and English and can speak Spanish in a conversational, medical setting.

When she isn’t at Advanced Obstetrics & Gynecology, LLC treating women with minimally invasive surgery or helping them manage conditions affecting their reproductive health, Dr. Belkina enjoys spending time with her husband and their son and 2 daughters. She also enjoys spending her free time reading and traveling to new places.

Dr. Belkina was recognized by Castle Connolly's Jersey Best Rising Stars Top Doctors in 2022.  

Manisha Abeysinghe, MD, is a board-certified obstetrician and gynecologist with an additional board certification in anti-aging and regenerative medicine practicing at Advanced Obstetrics & Gynecology, LLC, with locations in Lebanon, Branchburg, and two offices in Flemington, New Jersey. Dr. Abeysinghe has a diverse range of experience and expertise, taking special interests in minimally invasive surgery, general obstetrics, and health and wellness optimization.

Dr. Abeysinghe attended Ohio University in Athens, Ohio, for her undergraduate studies. For her medical education, she attended Ohio State University College of Medicine in Columbus, Ohio. Then, she completed her residency at Riverside Methodist Hospital in Columbus, Ohio.

Shortly after she finished her residency, Dr. Abeysinghe moved to Singapore with her husband for his job. While she was there, she was a medical advisor and flight doctor for International SOS, the world’s largest medical assistance company. She also spent time in Singapore studying Ayurveda and other Eastern medicine techniques. 

Throughout her career, Dr. Abeysinghe has received awards and recognition for her skills and her notable compassion for patients in her care, including Healthy Living’s New Jersey Top Doctor, multiple Patient Choice Awards, an outstanding laparoscopic surgery award, and a most compassionate doctor award. 

Today, Dr. Abeysinghe is affiliated with many organizations of her professional peers. She is active with the Society of Laparoendoscopic Surgeons, the American Association of Gynecologic Laparoscopists, the American Board of Anti-Aging and Regenerative Medicine, and the Asia-Pacific Association of Gynecologic Endoscopy. She is also a Reiki I and Reiki II master and holds an ayurvedic degree from the Institute of Ayurvedic and Integrative Medicine. 

Dr. Abeysinghe has been named a Top Doctor in New Jersey by Castle Conolly for the past several years including in 2025.

Outside of her work, Dr. Abeysinghe enjoys traveling with her husband and two children, cooking, and reading.

Seth Rubin, MD, is a board-certified obstetrician and gynecologist at Advanced Obstetrics & Gynecology, LLC, with locations in Lebanon, Branchburg, and two offices in Flemington, New Jersey. He strives to connect with his patients and provides a wide variety of treatments for uterine fibroids, menopause, infertility, and high-risk obstetrics.

Dr. Rubin attended the University of Pennsylvania in Philadelphia, Pennsylvania, where he graduated summa cum laude in 1985. For medical school, he attended Albert Einstein College of Medicine in the Bronx, New York. There, he completed an honors research project in obstetrics and gynecology.

After finishing his schooling, Dr. Rubin returned to Philadelphia to complete his residency at the hospital of the University of Pennsylvania. He has been in practice since 1993, shortly after he finished his residency training in obstetrics and gynecology.

Dr. Rubin’s expertise, skill, and dedication earn frequent recognition from his peers and patients. Since 2008, his peers have elected him as a top doctor in New Jersey annually. He has also received awards from New Jersey Monthly and U.S. News. 

At Advanced Obstetrics & Gynecology, LLC, Dr. Rubin uses his extensive training to perform advanced minimally invasive procedures. He helps women with birth control management, menopause, urinary incontinence, endometriosis, and an array of other sexual and reproductive health matters.

Outside of work, Dr. Rubin enjoys spending time with his wife and two daughters. The family enjoys outdoor activities like hiking and canoeing as well as cultural events like theater and concerts.

Dr. Seth M. Rubin has been named Top Doctor in New Jersey with both Castle Connolly and New Jersey Monthly publications for the past 18 years including in 2025. 

Grace Fimbel, MS, CNM, NP, is a certified nurse practitioner specializing in women’s health. She is proud to provide compassionate care and patient education to her patients at Women’s Healthcare of Princeton in Princeton, New Jersey, where she joins the team in their mission to care for women at all stages of life in a safe and caring environment. 

A Hunter College graduate, Grace earned a Master of Science in women’s health and midwifery from Columbia University School of Nursing in New York City. She has worked at Elmhurst Hospital in Queens, Elizabeth Seton Childbearing Center in Greenwich Village, Planned Parenthood in Hamilton and Trenton, New Jersey, and most recently, at St. Peter’s University Hospital as a midwife.

A native of New York City, Grace now lives in New Jersey and is a mother of two adult children and a grandmother to one grandson. Outside of work, she loves to travel and spend time with friends and family.

Philadelphia Magazine Top Doctors™ 2018: Obstetrics and Gynecology

Sonya Lee, MD is passionate about sharing her expertise in the field of gynecology with her patients in Philadelphia, Pennsylvania. She currently practices at Gynecology Specialists of Philadelphia.

Dr. Lee’s renowned skill in minimally invasive gynecologic surgery has garnered acclaim such as The Award of Excellence in Laparoscopic Surgery from the American Association of Gynecologic Laparoscopists and recognition as a “Top Doc” by US News and World Report.

After receiving her medical degree from the University of Michigan, Dr. Lee completed her residency at Pennsylvania Hospital.

A distinguished leader in women’s health, Dr. Lee served as Director of Gynecology at Graduate Hospital for six years before she was recruited as Chief of Gynecology at Penn Presbyterian Medical Center.

Besides treating patients, Dr. Lee teaches both residents and medical students as an assistant professor at the University of Pennsylvania School of Medicine. Her focus includes comprehensive women’s health, minimally invasive surgery, urinary incontinence, and pelvic organ prolapse.

Dr. Lee’s compassionate approach to patient care includes listening to concerns as well as educating and empowering women to take charge of their health. She knows that every woman is unique and tailors treatment plans to meet each patient's needs.

Philadelphia Magazine Top Doctors™ 2018: Obstetrics and Gynecology

Sonya Lee, MD is passionate about sharing her expertise in the field of gynecology with her patients in Philadelphia, Pennsylvania. She currently practices at Gynecology Specialists of Philadelphia.

Dr. Lee’s renowned skill in minimally invasive gynecologic surgery has garnered acclaim such as The Award of Excellence in Laparoscopic Surgery from the American Association of Gynecologic Laparoscopists and recognition as a “Top Doc” by US News and World Report.

After receiving her medical degree from the University of Michigan, Dr. Lee completed her residency at Pennsylvania Hospital.

A distinguished leader in women’s health, Dr. Lee served as Director of Gynecology at Graduate Hospital for six years before she was recruited as Chief of Gynecology at Penn Presbyterian Medical Center.

Besides treating patients, Dr. Lee teaches both residents and medical students as an assistant professor at the University of Pennsylvania School of Medicine. Her focus includes comprehensive women’s health, minimally invasive surgery, urinary incontinence, and pelvic organ prolapse.

Dr. Lee’s compassionate approach to patient care includes listening to concerns as well as educating and empowering women to take charge of their health. She knows that every woman is unique and tailors treatment plans to meet each patient's needs.

Chike Obianwu, MD, serves Alliance OB/GYN, located in Hainesport and Delran, New Jersey, as board-certified OB/GYN and cosmetic surgeon with advanced training in minimally invasive surgery and robotic surgery, and a special interest in fibroid management. He also has extensive experience in high-risk obstetrics.

Dr. Obianwu received in Bachelor of Science in microbiology from Tulsa University, before going on to get his doctorate of medicine from Ross University. Following medical school, Dr. Obianwu completed a fellowship in minimally invasive cosmetic surgery.

Dr. Obianwu is a Fellow of the American College of Gynecology, a Fellow of the American College of Surgeons, and a Fellow of the American College of Cosmetic Surgery. He’s also a member of the American College of Obstetrics and Gynecology, American Medical Association, American Association of Gynecologic Laparoscopists, American Society for Laparoendoscopic Surgeons, and American Academy for Cosmetic Surgeons.

Before joining the team at Alliance OB/GYN, Dr. Obianwu worked in academics for over 20 years. During that time, he taught, among other places, at the University of Buffalo in Buffalo New York, as a clinical assistant professor. Today, he spends some time as a clinical assistant professor at Drexel University in Philadelphia.

From 2006 to 2016, Dr. Obianwu worked as the chief of Obstetrics at Virtua-Memorial Hospital in Mount Holly, New Jersey. While there, he sat on several committees, took on a variety of leadership roles, and piloted the hospital’s da Vinci® robotic surgery program. He continues to serve on the Virtua Hospital Robotic Steering Committee.

Named Top Doctor in New Jersey, every year since 2010 by various organizations, Dr. Obianwu is one of the most educated, experienced, and sought-after gynecologists around the globe. He’s dedicated to advancing women’s health care and finding new, less invasive ways to treat patients.