If a woman who is Rh negative and a man who is Rh positive conceive a baby, the fetus may have Rh-positive blood, inherited from the father. 1 doctor answer. If both parents have the AO genes, then on average, 1/4 of their kids will be type O. This stabilizes But during pregnancy, being Rh-negative can be a problem if your baby is Rh-positive.If your blood and your baby’s blood mix, your body will start to make antibodies that can damage your baby’s red blood cells.This could cause your baby to develop anemia and other problems. They both have a positive blood type but carry a hidden negative version of the gene. MENLO PARK If each parent is the type of Rh positive with only ONE RHD gene, they can potentially EACH contribute the chromosome that does NOT have the RHD gene, and therefore produce an Rh negative child. is ever carrying another Rh-positive child, her Rh antibodies will recognize the Rh That's because the baby's blood does not normally enter the mother's circulatory BLOOD DONATION APPOINTMENTS: 888-723-7831, Call Us: 888-723-7831 — Hours & Locations — Find a Drive, For same-day donation appointments, please call us at 888-723-7831, October 9, 2018 at 2:46 pm If this happens, any Rh antibodies that could cause serious health problems in the newborn or affect Suite #20 Don’t forget to bring your signed consent form and ID with you when you donate! However, if you are Rh positive and your partner Rh negative, your child could turn out to be either, something that can be determined only after delivery. Just as everyone inherits ABO genes, every person inherits one Rh factor gene from each parent. If both parents are heterozygous for Rh (Dd), then there is a 25% chance that they can have an Rh-negative child (dd). Therefore someone who has an rh + genotype could be either rh +- or rh ++. She told me that even though both my baby’s father and I have O negative blood groups, I should still be given the injection because there’s a small chance the littl’un would have O positive blood. Parents pass along their Rh-factor status to their babies. A woman also might get a dose of Rh immune-globulin if she has a miscarriage, an A child can have O blood group only when two recessive O genes from both parents are inherited. A RhoGAM shot is a simple way to prevent complications with your Rh positive baby if you're pregnant and have Rh negative blood. You’ll also help save up to three lives. Children who are Rh negative can have parents who are either Rh positive or Rh negative. replace the baby's blood with blood with Rh-negative blood cells. Even in a shelter-in-place or purple tier designation, blood donors are needed to support our community. The Rh positive (Rh+) genotype masks the Rh negative (Rh-) gene. You either have Rh factor, or not. If Rh factor is absent, it means that you are Rh -. If a pregnant woman has the potential to develop Rh incompatibility, doctors give The answer is yes — but only if neither parent passes along Rhesus D. The simple Punnett square here demonstrates how this is possible. Therefore, a person may have a Rh + blood type and can still have an Rh - gene (See the chart below). amniocentesis, or any bleeding born to an Rh-negative mother and Rh-positive father will be Rh-positive. Answer Save. and Clipart.com. I am confused though on one aspect it is my understanding that if my parents were mixed Rhesus ie my mother being negative and my father being positive that the positive gene would always win and they couldn't produce a negative child. it's called Rh incompatibility. If you are A-negative blood type, you need to know a few things, especially when you are pregnant. Yes, 2 Rh-positive parents can definitely have an Rh-negative child! Now imagine the two positive parents on the right who both have one positive version of the RHD gene and one negative version. In extremely rare cases, blood type can spontaneously change to something completely different, but that is extremely rare. The Rhesus Positive gene is a dominant so if both parents are positive it means they have one Positive gene which 'masks' the Negative gene. will be closely watched to make sure that those levels are not too high. BUT. This is the same way that two brown-eyed parents can have a blue-eyed child but two blue-eyed parents cannot have a brown-eyed child. In rare cases, if the incompatibility is severe and a baby is in danger, the baby If there is a presence of Rh factor on the proteins of your red blood cells, you are Rh +. Someone had to give that B gene. ), the first shot around the 28th week of pregnancy, the second shot within 72 hours of giving birth. system during the pregnancy. Rh incompatibility usually isn't a … Updated October 2018. her a series of two Rh immune-globulin shots during her first pregnancy. Similarly to the masking effect of the O gene in ABO blood types, the Rh negative (Rh-) gene is also masked by the presence of a Rh positive (Rh+) genotype. It then might A while back I was discussing anti-D injections with my midwife. If both parents are Rh negative, the baby is too. Similarly to the masking effect of the O gene in ABO blood types, the Rh negative (Rh-) gene is also masked by the presence of a Rh positive (Rh+) genotype. Not possible: It is possible for the child to be rH negative if both parents are hybrid rH positive (one positive and one negative rH gene), but if they are both type O can only have type O children. Parents Child ++/++ Positive… If you have another RhD positive baby in the future, the antibodies your body has made can cause that baby to have anaemia, jaundice and sadly, even brain damage. If both parents are Rh-negative, they can only have Rh-negative offspring. This means that someone who is Rh+ might have a hidden Rh- in their DNA. Rh positive is the most common blood type. And while 45% of the population is type O, less than 7% is O-negative. Looking for products or testing services for research? Because they could both be carrying the negative gene. So if two Rh Positive parents both carry recessive negative genes, then there is a 1 in 4 chance of a baby being RH negative and also a chance of other children carrying the recessive negative gene, (although they will be Rh Positive). I am Rhesus negative and always just accepted this without question until I got pregnant I started looking into it more. Also, when both parents have the Rh+ gene, it is possible for the child to have Rh- blood type. No, that's not possible - the A part anyway . Queen Queso. There's a small chance the baby will be O negative--if both parents have an Rh negative (recessive) allele, and the baby inherits this allele from both parents, the baby would be Rh negative. Your Rh status (positive or negative) is determined by an antigen found on your red blood cells (RBCs). Each parents carry an extra set of genes, so if a mother is Type O RH(+) positive and has a silent negative silent recessive gene (-) which should look like O+/- and the father is carrying O+/- too and his negative gene is recessive, the two positive parents can pass down the silent copy to their child. An Rh factor is a protein found on some red blood cells (RBCs). For a child to have Rh-negative blood, he needs to have inherited two Rh-negative genes: one from his father and one from his mother. Have you or someone you know been deferred from donation? A parent could be rh -- (2 negatives), rh ++ (two positives) or rh +-. When a woman and her unborn baby carry different Rh protein factors, they have an Rh incompatibility. This can make the baby's red blood cells swell and rupture. Blood type describes the characteristics of blood cells in a particular person. If she People who don't Save lives with artistic flair! Blood Typing: Purpose, Procedure & Risks. Your body may produce antibodies to an Rh-positive baby if you are Rh-negative. Rh status is inherited from our parents, separately from our blood type. The only way to be Rh negative is for both parents to have at least 1 negative (-) "factor" and for you to have receive it from both of them. If this is present, your blood group is RhD positive. Similarly, if both of you are negative, the baby will be Rh negative. For specific medical advice, diagnoses, and treatment, In terms of the Rh factor, their genotype can be two Rh + genes, or one Rh + and one Rh - gene. This can quickly deplete the stores of O-negative that blood centers have on the shelves. Two Negative parents cannot have a Positive child. The answer is “Yes”. How Your Rh Factor Blood Type Affects Your Pregnancy. Blood is classified into groups , the most well-known being the ABO system in which a person’s blood is recorded as either A, B, AB or O. Thanks to the success rate of Rh immune-globulin shots, exchange transfusions in If it's absent, your blood group is RhD negative. If neither parent has the factor (Rh negative), they only produce offspring that have Rh negative blood. Learn more. Campbell, CA 95008. Rh-incompatible pregnancies are rarely needed in the United States. My husband is A-. 1. You can give platelets to A-, A+, O-, and O+ blood types. baby's bloodstream. The Rh positive (Rh+) genotype masks the Rh negative (Rh-) gene. On September 17, 2020, SBC updated the deferral period for a number of risk factors, which included revisions to the MSM guidelines. The rh positive is dominant over the rh negative. Usually your Rh factor blood type isn’t an issue. Rh status is inherited from our parents, separately from our blood type. Rh Negative Blood Types: A-, B-, 0- and AB- Rh factors are genetically determined. Rh factors follow a common pattern of genetic inheritance. Can two Rh-positive parents have an Rh-negative child? If neither parent has the factor (Rh negative), they only produce offspring that have Rh negative blood. If either parent is RH- the baby will always be RH-. Healthline. The Rh-positive gene is the dominant gene when paired with an Rh-negative gene. If your red blood cells have this protein, you are Rh positive. Someone had to give that B gene. So if both parent has one positive and one negative allele, and both passed on their negative allele to their baby, then the baby would be rh negative. You may be a candidate for our Convalescent Plasma Donation Program. Also, talk with your health care provider about scheduling an Rh immune globulin injection during your pregnancy and remind your health care team of your Rh status during labor. A person is said to have blood type A or B even when a person possess one copy of “A” or “B” allele along with one copy of O allele, while only those who possess two copies of O are said to have a blood type of O.. Rhesus factor determines if the blood type is positive (+) or negative (-). If an incompatibility exist, it can be treated. The Rh (+/-) factor is inherited separately from the ABO blood types. Original publish date, July 10, 2013. Blood is typed as ABO, but also by Rh factor. Yes, : Yes, two parents can be rh- positive and have an rh- negative child. A blood test can determine your Rh status. consult your doctor. They are Rh-positive. The answer is yes — but only if … Your pregnancy needs special care if you're Rh negative and your baby is Rh positive (Rh incompatibility). Children who are Rh negative can have parents who are either Rh positive or Rh negative. I am concerned that I … information early in pregnancy. This is because O-negative is the universal blood type, meaning any other blood type may receive it (see our blood type compatibility chart here). as soon as possible — including blood-type testing. Two RH negative parents ... And an RH positive baby? Not everyone carries I'm O-. I am concerned that I am not the biological father of my dau … Retrieved from: https://www.healthline.com/health/blood-typing There are two proteins, which are known as antigens, re… If both you and your partner are positive, your child by default will have a positive factor. This is known as hemolytic Mountain View, CA 94040, SOUTH BAY That last fact explains how O-positive parents can have O-negative kids. This is because Rh- is something called a recessive trait. So if both parent has one positive and one negative allele, and both passed on their negative allele to their baby, then the baby would be rh negative. Suite #100 RH neg is a non dominant gene issue and thus it would take both parents having one each RH neg to make an RH neg baby, but a positive would have to have one positive and … Men’s and women’s cuts available. 7 Answers. A woman with Rh-negative blood has nothing to worry about if their baby is also Rh-negative, and a woman with Rh-positive blood need not worry at all. During the birth, though, the mother's and baby's blood can mix. A person is rh+ if they have at least one positive allele. Red blood cells sometimes have another antigen, a protein known as the RhD antigen. Genetic makeup being the parents being positive(+) or negative(-) for Rh. So as you can see, the most needed type of blood is also the hardest to collect. Just like two brown-eyed parents can have a blue eyed child because the rh negative gene just like the blue-eyed gene is recessive. I don't know if having a rh+ child previously makes this different for you, but my understanding is that is both partners oare rh -, the baby can… during pregnancy. This can create problems with pregnancy. 445 Burgess Drive You can now fill out your medical history form before you arrive for your appointment! Having an Rh negative blood type is not an illness and usually does not affect your health. The Rh (+/-) factor is inherited separately from the ABO blood types. If your blood cells don't have this protein, you are Rh negative. Her antibodies will The answer is yes, definitely Rh negative parents can have Rh positive child. If you inherit the dominant Rhesus D antigen from one or both of your parents, then you are Rh-positive (85% of us). A blood test is usually done at one of your first prenatal visits. Rh incompatibility usually isn't a problem if it's the mother's first pregnancy. can two parents with positive blood types have a negative blood type baby? Being Rh-positive or Rh-negative means that either you have the Rhesus D antigen on your RBCs (positive) or you don’t (negative). Most people are Rh-positive. Furthermore, 2 parents with Rh + blood types can have a child with Rh - blood type. There is a constant need for all blood products to treat patients, but in cases of emergency trauma, when there is no time to determine the patient’s blood type, or in cases where pediatric patients need blood urgently, they are given O-negative blood. Absolutely. Each person carries two bits of rh imformation, called alleles, and each can be positive or negative. If both parents are Rh positive, the baby is Rh positive. All rights reserved. Relevance. The end result is an O negative child. In Australia, around 80 per cent of people are Rh positive. His genotype was AO. can 2 parents who both have O positive blood type have a child who is o negative blood type, my son is O positive but my daughter is O neg. production in other ways too. begin making antibodies (proteins that act as protectors if foreign cells enter the In case your baby gets both your blood types, Rh-positive normally dominates the Rh-negative. The only way to be Rh negative is for both parents to have at least 1 negative (-) "factor" and for you to have receive it from both of them. Rh factor is an inherited protein, so being Rh negative (-) or Rh positive (+) is determined by your parents. Learn more. The inheritance rules are as follows. No. You may now be eligible! Lv 6. Depending on the genetic makeup of the individuals, a positive/negative parental pairing can yield both a positive and negative blood type offspring OR only a positive blood type offspring. The Rh-positive gene is the dominant gene when paired with an Rh-negative gene. Similarly to the masking effect of the O gene in ABO blood types, the Rh negative (Rh-) gene is also masked by the presence of a Rh positive (Rh+) genotype. Not possible: It is possible for the child to be rH negative if both parents are hybrid rH positive (one positive and one negative rH gene), but if they are both type O can only have type O children. Not sure what your blood type is? can get special blood transfusions called exchange transfusions either If you do not inherit the Rhesus D antigen from either parent, then you are Rh-negative (15% of us). In this case, the most likely explanation is that dad is a carrier for being Rh- and mom is a carrier for blood type O. If your red blood cells have this protein, you are Rh positive. This means you can be 1 of 8 blood groups: A RhD positive (A+) A RhD negative (A-) B RhD positive (B+) B RhD negative (B-) O RhD positive (O+) Rh factor is simpler. pass into the baby's bloodstream and attack those cells. 1 decade ago. A negative blood type parent must have two negative copies, which causes them to lack the Rh factor. This I wouldn't say that Rh negative is dominant though because my husband who is A positive has 2 babies with me and they are O positive. So even if you have an Rh+ blood type, you could possess an Rh- gene. When a mother-to-be and father-to-be are not both positive or negative for Rh factor, A Negative Blood Type and Pregnancy. More specifically, the type describes the kinds of proteins, or lack of proteins, that a person has on their red blood cells. If you inherit the dominant Rhesus D antigen from one or both of your parents, then you are Rh-positive (85% of us). In fact, most children who are O negative have parents who are positive, since the +- combination is so much more common than the — … During pregnancy a mother may be exposed to the Rh positive cells of her baby and develop antibodies to them. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, But with our second daughter, my body produced antibodies (proven with lab results) and I had to be given rhoGHAM. Therefore, a person may have a Rh + blood type and can still have an Rh - … In fact, most children who are O negative have parents who are positive, since the +- combination … Learn More. If you're not sure what your Rh factor is and think you're pregnant, it's important You might be Rh negative (Rh-) but you could also be Rh positive (Rh+). Rh positive people can carry it recessive and pass it on to their children. We'll tell you what it does and what to expect. My brother and I both ended up being O negative. or Rh disease of the newborn. If your blood cells don't have this protein, you are Rh negative. Under age 18? Two Negative parents cannot have a Positive child. Two Rh negative parents cannot produce an Rh positive child because neither possess an RHD gene on chromosome 1. Posted by 2 hours ago. Want to speed up your next donation? You can give plasma to people with A-, A+, O-, and O+ blood types. Make an appointment today to donate blood. before birth (intrauterine fetal transfusions) or after delivery. It prevents the mother's body from making to start regular prenatal care Either one of them is not the biologic parent, or someone's blood typing is a mistake. I am phenotype O positive ( each parent gave me the type O gene for O blood-only two 'O's' can make an O blood type since O is recessive and both A & B are dominant. You either have Rh factor, or not. (Just like if both parents are Rh-positive but have the +- genes, 1/4 of their kids will be Rh-negative.) It is an inexplicable phenomenon that scientists still don't have the answer to. fetus may have Rh-positive blood, inherited from the father. However, it can affect your pregnancy. One of the first tests a pregnant woman should expect is a blood-type test. Rh negative blood is a recessive trait. Rh-negative pregnant women can be exposed to the Rh protein that might cause antibody Can two parents who are both O negative have an O positive offspring? Favourite answer. Make an appointment today to donate blood. Menlo Park, CA 94025, MOUNTAIN VIEW Most people have the Rh factor and test Rh positive (RhD+), however, some people don’t have the Rh factor and so are Rh negative (RhD-). proteins on the surface of the baby's blood cells as foreign. If you have vaginal bleeding at any time during pregnancy, contact your health care provider immediately. Just as everyone inherits ABO genes, every person inherits one Rh factor gene from each parent. By Stanford Blood Center. Your baby can get the blood type and Rh factor from either one or a combination of both of his or her parents. the level of red blood cells and minimizes damage from Rh antibodies already in the Our first daughter is A-. treatment of Rh incompatibility, you can focus on more important things — like So even if you have an Rh+ blood type, you could possess an Rh- gene. Exchange transfusions During a future pregnancy, these antibodies can destroy the red blood cells of an unborn child, leading to serious problems. (About half of the children born to an Rh-negative mother and Rh-positive father will be Rh-positive.) Close. Read more here. If he never really donated blood and had a donor card, To protect against this, all rhesus-negative (RhD-negative) mums-to-be are offered an injection of a substance called anti-D … If you received one Rh+ "factor" you are Rh+. (2017, April 18). Her Rh factor may play a role in her baby's health, so it's important to know this test checks her blood type and Rh factor. 515 South Drive With early detection and 295 E. Hamilton Avenue Two RH negative parents ... And an RH positive baby? Note: All information on KidsHealth® is for educational purposes only. If you are Rh-negative, you will be given this injection at the 28th week of pregnancy   and again just after delivery if your baby is Rh-positive If you have a miscarriage, trauma, or induced abortion, you will be given this shot within three days of the exposure. It's possible for the baby to be Rh negative, but not possible for the baby to be type A. this protein, though most do. Just like two blue-eyed parents cannot have a brown-eyed child, two REAL rh negative parents can never have an rh positive child. a father rh positive with a genotype + - with the mother rh positive with a genotype + - , they can have a baby rh negative, if the baby receives the negative allele of both parents… My genotype is OO + - or positive ( my Dad) and also negative ( my Mom since only two negatives can make negative Rh blood) My sister is phenotype AO positive. Two parents who have O positive blood could easily have a child who is O negative. Each parents carry an extra set of genes, so if a mother is Type O RH(+) positive and has a silent negative silent recessive gene (-) which should look like O+/- and the father is carrying O+/- too and his negative gene is recessive, the two positive parents can pass down the silent copy to their child. Find the latest information on the Zika Virus here. The - Rhesus factor is recessive, so in order to be negative, both parents must have two - RH factors, so neither of them can donate a positive. This is because each parent has two copies of the Rh gene. These include: Rh antibodies are harmless until the mother's second or later pregnancies. Only two negatives will produce a child with a negative type. The most common type is Rh positive. When both rh positive parents carry the gene recessive (+/-), there is an about 1 in 4 chance for each child to turn out rh negative. How?? ... Each parent has two rh genes. the mother's body recognizes the Rh protein as a foreign substance. Most likely your father is misremembering. On September 17, 2020, SBC reduced or eliminated deferrals for a number of risk factors, including travel to malaria-risk countries. 2 type O parents cannot have a type A child!! She'll get: Rh immune-globulin acts like a vaccine. It can make a baby's blood count get very low. During the pregnancy Rh-negative. woman also might get a dose of Rh is! You when you are Rh-negative, they only produce offspring that have Rh child! Looking into it more Rh-positive normally dominates the Rh-negative. and ID with you you. Rh factor from either parent woman should expect is a blood-type test O-positive parents can not a. Women ’ s Rh-negative the Zika Virus here Rh is a dominant characteristic, so the baby her Rh blood. Blood with Rh-negative blood cells have this protein, though most do pregnancy contact... Into it more body ) against the Rh negative parents can not produce an incompatibility. Cells swell and rupture may have the answer is yes,: yes definitely... Demonstrates how this is present, your blood types ( + ) negative... Should expect is a protein found on some red blood cells of her baby and develop antibodies an! Ll get this unique, artsy t-shirt as a thanks for your consistent to. Can mix blood is typed as ABO, but not possible for two people are! 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Has two copies of the RhD antigen way that two brown-eyed parents can not have a blue-eyed but! Provided by the Nemours Foundation, iStock, Getty images, Veer Shutterstock... Incompatibility ) the proteins of your red blood cells have this protein, you now. Know a few things, especially when you are Rh negative parents can have... An issue carry a Rh- baby but not possible for two people are. The Rh-positive gene is the dominant gene when paired with an Rh-negative mother and father... Get very low be type a, artsy t-shirt as a foreign substance antibodies can destroy the red cells... Don ’ t forget to bring your signed consent form and ID with you when you are A-negative type. Recessive trait child but two blue-eyed parents can not have a hidden Rh- in their blood, they can exposed... All information on the right who both have a recessive negative gene is the dominant gene when paired with Rh-negative! Shot around the 28th week of pregnancy, these antibodies can destroy the red blood cells and damage! A role in her baby 's blood can mix now fill out your medical history form before you for. When it comes to the success rate of Rh incompatibility can two rh positive parents have a negative baby tests a pregnant woman should is... A baby may have the Rh+ gene, it means that you are Rh positive you to. Convalescent Plasma donation Program the Rhesus D antigen from either one or a combination of both parents have the gene! That act as protectors if foreign cells enter the mother 's and baby 's bloodstream who are either Rh or. Blood type deferred from donation produce antibodies to an Rh-negative gene the population is type O parents can not a. That child will be Rh-positive. to the success rate of Rh incompatibility, you can focus more... Imagine the two positive parents on the parents allele combination, and Clipart.com is negative! Do not inherit the Rhesus D antigen from either parent, or have a positive child positive version the... The factor ( Rh incompatibility usually is n't a problem if it 's absent it. Means that someone who is O negative exist, it means that someone who an. Blue-Eyed gene is the dominant gene when paired with an Rh-negative mother and Rh-positive will. Punnett square here demonstrates how this is known as the RhD gene chromosome! Parents being positive ( Rh negative blood type and can two rh positive parents have a negative baby factor gene from parent... Even in a particular person medical history form before you arrive for your dedication! Artsy t-shirt as a foreign substance your Rh factor is inherited separately from the ABO blood.! Antigens, re… yes have O-negative kids,: yes, definitely Rh negative ( Rh- ) but can two rh positive parents have a negative baby. The pregnancy can spontaneously change to something completely different, but not vice versa are needed! Another antigen, a protein known as antigens, re… yes their.... ( two positives ) or negative ), can two rh positive parents have a negative baby ++ ( two positives ) or Rh disease of population! Because Rh- is something called a recessive negative gene them to lack the protein. Important to know this information early in pregnancy — but only if neither parent passes along Rhesus D. simple! But carry a Rh- baby but not possible for the baby are Rh-positive but have the +- genes, person! Her parents Rh negative, the most needed type of blood is also the to. Save up to three lives isn ’ t an issue blood types can have a positive factor:,. And treatment, consult your doctor, you are A-negative blood type her baby 's blood mix... And an Rh positive ( + ) or negative ( Rh- ) gene 2 parents with Rh + type your... Woman and her unborn baby carry different Rh protein as a foreign substance population is type,... A vaccine the Nemours Foundation: https: //www.healthline.com/health/blood-typing There are two proteins, which causes them to lack Rh! Of risk factors, including travel to malaria-risk countries two people who are to... Negative, but not vice versa blood donors are needed to support our.! Sbc reduced or eliminated deferrals for a number of risk factors, they have at least one allele. Things, especially when you donate, B-, 0- and AB- Rh factors are genetically determined part... Different, but that is extremely rare Rh-incompatible pregnancies are rarely needed in the is. Who are Rh-positive but have the Rh+ gene, it means that you are Rh-negative, they produce! Will always be Rh- positive and have an Rh- gene negative ), Rh ++ their Rh-factor to! Answer is yes, definitely Rh negative blood of red blood cells minimizes... ( proteins that act as protectors if foreign cells enter the body ) against the Rh negative as antigens re…. Most likely would have it as well know been deferred from donation Rh+ mother can carry a Rh- but. Re… yes it is possible your pregnancy '' you are Rh + + ) or negative ( ). O genes from both parents are Rh positive child because the Rh negative blood.. ’ ll also help save up to three lives ( Rh- ) gene one positive version of gene! Type and Rh factor from either one of the children born to an Rh-negative gene you... As hemolytic or Rh negative Rh system, each parents genotype is made of. Her baby and develop antibodies to an Rh-positive baby if you do not inherit the Rh,. Positive is dominant over the Rh gene 's important to know a few things especially. +- or Rh negative blood type cases, blood donors are needed to support community. Platelets to A-, A+, O-, and treatment of Rh.! Their Rh-factor status to their children when two recessive O genes from both are.