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What causes Rh disease?

April 26, 2017causes disease Rh

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What causes Rh disease?

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Every person has a blood type, (O, A, B, or AB) and an Rh factor, either positive or negative. The blood type and the Rh factor simply mean that a person’s blood has certain specific characteristics. The blood type is found as proteins on red blood cells and in body fluids. The Rh factor is a protein that is found on the covering of the red blood cells. If the Rh factor protein is present on the cells, the person is Rh positive. If there is no Rh factor protein, the person is Rh negative. Rh factors are genetically determined. A baby may have the blood type and Rh factor of either parent, or a combination of both parents. Rh factors follow a common pattern of genetic inheritance. The Rh positive gene is dominant (stronger) and even when paired with an Rh negative gene, the positive gene takes over. For example: • If a person has the genes + +, the Rh factor in the blood will be positive. • If a person has the genes + -, the Rh factor will be positive. • If a person has the genes – -, t