Scientists sometimes study Rhesus monkeys to learn more about the human anatomy because there are certain similarities between the two species. While studying Rhesus monkeys, a certain blood protein was discovered. This protein is also present in the blood of some people. Other people, however, do not have the protein. The presence of the protein, or lack of it, is referred to as the Rh (for Rhesus) factor.
If your blood does contain the protein, your blood is said to be Rh positive (Rh+). If your blood does not contain the protein, your blood is said to be Rh negative (Rh-).
This Rh factor is connected to your blood type. For example, your blood may be AB+ which means that you have type AB blood with a positive Rh factor. Or, you might have O- blood which means that you have type O blood with a negative Rh factor.
It is particularly important for expectant mothers to know their blood's Rh factor. Occasionally, a baby will inherit an Rh positive blood type from its father while the mother has an Rh negative blood type. The baby's life could be in great danger if the mother's Rh negative blood attacks the baby's Rh positive blood. If this happens, an exchange transfusion may save the baby's life. The baby's blood can be exchanged for new blood that matches the mother's.
2006-12-14 02:43:36
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answer #1
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answered by Melli 6
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84% of the population is Rh positive - good news if you ever need a blood transfusion. Common as muck - just like me!!
We all have these little marker things called antigens on the surface of our red blood cells.
These are so tiny they can't even be seen under a microscope.
Everyone's got different ones - blame your parents and grandparents for all that.
In fact, only identical twins will ever possess all the same antigens.
f you have blood group A then you've got A antigens covering your red cells.
Blood group B means you have B antigens, while group O has neither, and group AB has some of both.
The ABO system also contains lots of little antibodies in the plasma, antibodies being the body's natural defence against foreign antigens.
So blood group A has anti-B in their plasma, blood group B has anti-A (you probably get the picture at this stage).
To complicate matters though, group AB has none and group O has both of the antibodies.
Which means giving someone blood from the wrong ABO group could be fatal.
The anti-A antibodies in group B attack group A cells and vice versa.
Which is why group A blood must never be given to a group B person.
Well, it gets more complicated here on in, because there's another antigen to be considered - the Rh antigen.
Some of us have it, some of us don't.
If it is present, the blood is RhD positive, if not it's RhD negative.
So, for example, some people in group A will have it, and will therefore be classed as A+ (or A positive).
While the ones that don't, are A- (or, wait for it...A negative).
And so it goes for groups B, AB and O.
This effectively doubles the number of different blood types to be matched, because you shouldn't mix blood type A+ with blood type A-.
84% of the population is Rh positive.
2006-12-14 02:45:43
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answer #2
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answered by Sassysaz 4
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Rh positive means you have one of several very closely related 'Rh' factors in your blood. Blood has lots of little 'factors' in it beside the type, but the Rh is the most important.
Rh comes from 'Rhesus,' because it was first discovered in Rhesus monkeys.
2006-12-14 02:44:42
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answer #3
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answered by Cobalt 4
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Blood types have to do with compatibility. Rh negative and rh positive people are strongly discouraged from having children together, as the children normally don't survive. Blood types: "A". "B", "AB" and "O" are compatible for procreation, but not for blood transfusions, except "O" which is considered the "universal" blood type, ie anybody may receive a type "O" transfusion without negative consequences. It is the rarest and most sought after by blood banks. Merry Christmas.
2006-12-14 02:47:38
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answer #4
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answered by Anonymous
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You only need the shot if the mom is RH negative. It doesn't matter if the dad is negative or not. I'm O+ and my husband is B-. I never had to get a shot.
2016-05-24 02:33:15
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answer #5
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answered by Anonymous
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