Does miscarriages happen mostly to O-negative blood types?

There is no scientific evidence to suggest that miscarriages happen mostly to O-negative blood types. Miscarriages can happen to people of any blood type, and there are many factors that can contribute to their occurrence, such as genetic abnormalities, chromosomal issues, hormonal imbalances, infections, autoimmune disorders, or other health conditions. While blood type may be a consideration in certain medical situations, it is not directly linked to a higher risk of miscarriages. If you have concerns about your risk of miscarriage, it is best to consult with a healthcare professional.