Obstetric Care in Rochester and Penfield, NY Providing Exceptional Prenatal Care. Genesee Valley Obstetrics and Gynecology offers comprehensive obstetrical services. Our OB/GYNs are highly trained and have extensive experience providing care to patients throughout the Rochester and Penfield area. Call (585) 641-0399 to schedule an appointment at one of our offices in Rochester or Penfield today!.