It is not uncommon for women to be born with only one ovary, and doesn't mean anything about her fertility because the other ovary just begins to ovulate for it. But "no blood flow detected in right ovary" is something to ask about, does it mean you don't have one in the first place, or that the ovary is seen but no blood flow is seen, or could this just be a fluke of the ultrasound? You might ask your doctor for an abdominal MRI, it sees tissue (which ultrasounds don't) and so therefore can image the internal organs.