Yes, two parents with blood type O can have a child. In fact, they will almost always have a child with blood type O. This is because the O blood type is recessive, meaning that a child needs to inherit two O genes, one from each parent, to have blood type O.
Since both parents have blood type O, they can only pass down the O gene. Therefore, their child will always inherit two O genes, resulting in blood type O.
However, there are rare instances where a mutation could occur, leading to a child having a different blood type than O. But, this is extremely uncommon.
Important Note: While blood type compatibility is generally not a concern for pregnancy, Rh factor incompatibility can be a factor. If the mother is Rh-negative and the father is Rh-positive, there is a chance that the baby could inherit the Rh-positive factor. This can lead to complications in subsequent pregnancies, so it is important to discuss this with a doctor.
