Provider Name: Robert Ottenritter, MD

Biography: Dr. Ottenritter is a native of the Baltimore area. He received his B.S. from Washington and Lee University and earned his M.D. from the University of Guadalajara. He completed his residency at both the University of Maryland and Maryland General Hospitals in 1987. He then joined the practice of Drs. Haws, Dudley, Morris and Spencer-Strong which had been established in 1933. The practice was later renamed Charles Street Ob/Gyn Associates, and Dr. Ottenritter is currently the president of the practice.

Dr. Ottenritter is board certified and has been a Diplomate of the American Board of Obstetrics & Gynecology since 1989. He is a Fellow in the American College of Obstetricians and Gynecologists. He is currently a member of MedChi, the Baltimore Medical Society, the American Fertility Society, the American College of Physician Executives, and the Delmarva Foundation where he serves as a physician advisor. Dr. Ottenritter is also a member of the century-old Medical and Surgical Club of Baltimore.

Dr. Ottenritter is married and has two children. He is a member of the Baltimore Country Club and the Amelia Island Plantation Club.

Provider Name: Onkar Nath Singh, MD

Biography:Dr. Singh received his M.D. from the world-renowned Prince of Wales Medical College in Patna, India in 1971. He began his residency training in India, and completed his training at Greater Baltimore Medical Center and Union Memorial Hospital in 1981. He was deeply involved in the training and development of residents at Union Memorial until 2000, and has been in private practice since 1981.

Dr. Singh has delivered more than 4,000 babies in his career. He has special interests in high risk obstetrics, minimally invasive surgery, and hysteroscopic surgery. His publications have been published in the Journal of Reproductive Medicine. He is a Diplomate of the American Board of Obstetrics and Gynecology, and is a member of bothe the American College of Obstetricians and Gynecologists and the Maryland Medical Chirurgical Society.

Provider Name: Laura Maciel Erdman, MD

Biography:Dr. Erdman was born in Mexico and grew up in northern New Jersey. She received her B.S. in Chemical Engineering in 1993 from Princeton University in Princeton, N.J., and earned her M.D. in 1997 from Cornell University Medical College in New York City. She completed her residency in Obstetrics & Gynecology at Baylor College of Medicine in Houston, TX in 2001, serving as administrative chief resident during her fourth year. She joined the faculty at Baylor following graduation as an Assistant Professor of Ob/Gyn. After moving to Baltimore County in 2003, Dr. Erdman spent two years at an inner-city not-for-profit community health center, providing obstetric and gynecologic care to an underserved, Hispanic population. She also was appointed to the voluntary teaching faculty at Johns Hopkins School of Medicine, and currently retains that appointment. Dr. Erdman joined Charles Street Ob/Gyn Associates in January of 2006.

Dr. Erdman is board certified and has been a Diplomate of the American Board of Obstetrics & Gynecology since 2003. She is a Fellow in the American College of Obstetricians and Gynecologists, and a member of MedChi, the Maryland Medical Society.

Dr. Erdman is married and has four children.

Provider Name: Gloria Hsu, CRNP

Biography: Gloria was born in Michigan, the oldest of four girls. At the age of seven she moved to Taiwan with her family and graduated from high school there. She then attended Wheaton College in Illinois where she obtained her degree in sociology with an emphasis in social work, while she worked on prerequisites for nursing school. She then attended Johns Hopkins School of Nursing where she received her B.S.N. She subsequently worked at Johns Hopkins Hospital as a RN for one year on the Infectious Disease unit. She returned to school to earn her master's degree at the University of Maryland, where she received her M.S.N. as a Family Nurse Practitioner. She was employed as a Nurse Practitioner at Bay West Endocrinology for 3 years, where she managed patients with diabetes and other endocrine disorders including thyroid disease, hypertension, and osteoporosis. She was recently certified as a Diabetes Educator. She has always had an interest in women's health, specifically pregnancy, and is very excited to be a part of Charles Street Ob/Gyn Associates. She is passionate about patient education and empowerment as well as compassionate and holistic care. She is married and has two sons.