Whats the rarest blood type? AB negative is the rarest of the eight main blood types - just 1% of our donors have it. Despite being rare, demand for AB negative blood is low and we dont struggle to find donors with AB negative blood.

What is the second rarest blood type?

Blood TypesO-, O+ Patients with any blood type can receive O negative blood. A+ This blood is the second most frequently occurring blood type. A-, B+, B- These are rare blood types and less than 10 percent of the population have this blood type.AB+ AB-

CAN A and O have a baby?

An A+ parent and an O+ parent can definitely have an O- child.