![]() Some researchers think that it may make people more resistant to certain parasites like Toxoplasma. This difference has probably stuck around because it has some good points too. Mom just has an ordinary DNA difference that can have bad effects on her pregnancy. ![]() As if the mother and child are from different species.īut they're not. HDN makes it look like the mother is rejecting the child. This is called hemolytic disease of the newborn or HDN. ![]() This can cause the baby to get very sick or even die. When an Rh negative mother is pregnant with an Rh positive child, the mother's immune system can attack the baby's blood. But some people think it must be special because of the effects it can sometimes have on pregnancy. So being Rh negative isn't any stranger than having blue eyes or red hair. No, being Rh negative did not come from aliens or gods. There is no need to invoke aliens, gods or reptiles. And when we look at Rh negative and Rh positive people, we see the usual kind of difference. We have different traits because of small differences in our DNA. There is DNA that controls our hair and eye color, our blood type and most everything else about us. Remember, DNA is the instruction manual that makes us who we are. So, where do these sorts of differences come from? They come from our DNA! In this way, it isn't any stranger than different eye or hair colors. In fact, Rh negative blood is an ordinary trait that some people have and some people don't. ![]() However, there is no evidence to support this. While research available now shows that blood type can tip the scale in terms of someone's risk of developing heart disease, big factors such as diet, exercise or even the level of pollution you're exposed to in your community are the major players in determining heart health.What an interesting question about Rh negative blood! It would be very cool to think that our human ancestors bred with reptiles and/or gods. Should I change my lifestyle based on my blood type? Cognitive impairment includes things like trouble remembering, focusing or making decisions. Other research has found people with type AB blood might be at an increased risk for cognitive impairment when compared to people with type O. People with type O blood may also fare worse after a traumatic injury due to increased blood loss, according to a study published in Critical Care. This may be especially true after childbirth, according to a study on postpartum blood loss, which found an increased risk in women with type O blood. People with type O blood enjoy a slightly lower risk of heart disease and blood clotting, but they may be more susceptible to hemorrhaging or bleeding disorders. Peter Dazeley/Getty Images Other consequences of blood type There are four main blood groups (types of blood): A, B, AB and O. "In short, it's almost like the body has evolved around its environment in order to protect it as best as possible," Guggenheim said. While our blood can't keep up with the different biological or viral threats going around in real time, it may reflect what's happened in the past. People with type O blood may get sicker with cholera, for example, while people with type A or B blood may be more likely to experience blood clotting issues. Douglas Guggenheim, a hematologist with Penn Medicine. People with type O-negative blood are considered " universal donors" because their blood doesn't have any antigens or proteins, meaning anyone's body will be able to accept it in an emergency.īut why are there different blood types? Researchers don't fully know, but factors such as where someone's ancestors are from and past infections which spurred protective mutations in the blood may have contributed to the diversity, according to Dr. The ABO system is the best known way of classifying blood types.
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