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  • Category: Gynaecology

    About marriage with my father's sisters son

    Are you worried about marriage with someone in your blood relation and its hereditary impact? Check this page to know more from our experts.

    My parents are going to fix a marriage with my father's sisters son. We both have a same blood group o+ can we marry? Will be any side effects in future.I am so tensed to say yes to wedding. Is there any medical tests to know before whether we can marry so no side effects will be there can be confirmed.
  • Answers

    8 Answers found.
  • Generally, this practice is there is in Telugu people. Many incidents are there who married like this and have no problems. But you are mentioning it that both of you are having same blood group. Medically people say it is not advisable to marry the same blood group person. My sincere advice to you is to be in touch with a good physician and take his advice before taking a decision on this matter. If the doctor gives a nod to go ahead you can decide positively.

    always confident

  • You need to seek the services of a good Genetic counseling department. This is based on the little knowledge that I have.
    1.It is common in South Indian for such marriages within families. In medical terms, this is termed as Consanguinous marriages.

    2.In your case O positive and O positive should not be a problem. Generally, if the mother is blood group(A,B, AB,O) negative, father is (A,B,AB, O) postive and the first child is (A, B, AB, O)positive, then the second child can have some adverse effects.

    3.In simple terms, we inherit our genetic imprint half from each parent. In cases of marriages within blood relative sort of dilutes the gene quality if there have been multiple consanguineous marriages among the families of your father and mother.

    4.In Consangionous Marriages, unions among cousins like this are better than a marriage of Uncle and Niece, a girl marrying her mother's younger brother.

    5. What you need is with the help of your parents looks for hospitals offering Genetic Pre-martial counseling.

    6.Here a detailed family tree history with the specific focus of marriages among blood relatives, the presence of children with underdeveloped mental status, abortions, early age diabetes, hypertension or some types of anemia, children with a congenital disease will be assessed. These professionals will give you a medical opinion about the presence of any risks, if yes, the chances of those risks.

    You don't need to worry too much, please seek the advice of Pre-martial Genetic Counsellors who can be found in large teaching medical college hospitals, corporate mother and child units.

  • Generally, such marriages are not prevalent in India, but this custom is in vogue among some communities of the southern part of the country. As this custom is in vogue, there will not be any problem from the legal angle.

    From the medical point of view, both of you have O+ve blood group. From my very basic knowledge, I can state that the offspring will not have and hereditary/genetic problem. However, I would advise you to take the guidance of any professor of genetics working in a good medical college.

    Come as you are!

  • There are many myths and fears associated with consanguineous marriages. It is believed that some diseases can transmit hereditary to the offspring in such marriages.
    You can consult some good doctor in this respect.
    Going by the logic of statistical sampling such marriages should not pose any problem because there is no study done on a large number of such cases to prove the pros or cons of such a match.
    There is definitely done some research in medical science fields about the consanguineous marriages but their authenticity in general terms can only be explained or advised by a qualified doctor in that particular field.

    Thoughts exchanged is knowledge gained.

  • As per medical science, there are some issues in the marriages held in close relations. There is an element of hereditary disease to come out of such relationship. So from that angle people may be fearful in allowing such relations.

    Ethically also there are societies and communities where this is not seen as a good thing and is discouraged.

    From a general point of these marriages are common in many other societies and people there do not find anything wrong with this.

    Scientifically speaking only a genetics expert doctor can give a concrete opinion or advice on this issue.

    Knowledge is power.

  • Considering the blood group, you both have same blood group and it will not pose any major problem. As stated by Mr. Natarajan above, we inherit blood group from both parents. If both parents have same blood group there are chances for the progeny to have the same blood group as well as different blood groups. It all depends on which blood group your parents carry.

    The various blood groups are:

    1. O positive
    2. O negative (Universal Donor)
    3. A positive
    4. A negative
    5. B positive
    6. B negative
    7. AB positive (Universal Recipient)
    8. AB Negative

    The positive and negative of a blood group depend on Rhesus factor (Rh factor). People who have this are positives and who don't have this are negatives.

    Since you both are same blood group, your children (if you marry) will not have any blood-related problems. As for the other major part of the question, your doubt about Consanguine marriage. In layman terms, a Consanguine marriage is a marriage between closely blood-related individuals.
    Scientifically a consanguineous marriage is a marriage between individuals who are related as second cousins or even more closer.

    2-3% of the infants born through this marriage have birth defects than normal. The abortion rate is no different than normal marriages. Since you are closely related to each other, you share most of the genetic makeup as well. Why are infants of this marriage genetically defective? It's because there is a term called 'expression of the recessive gene who have common ancestors'. I will give you an example of this:

    Males are heterogenetic with chromosomes X and Y. While females homogenetic with chromosomes X and X. So if a male inherits the single recessive gene, he will have that defect (example color blindness). But for a female to express a recessive character of a gene she should inherit two genes (because she has two X chromosomes). If she inherits one gene, she will be called as a carrier.

    So your relatives and elders may not be affected by these recessive genes, but there can be carriers which will be expressed within the progeny of consanguineous marriage and that is why consanguineous marriages are considered genetical mismatch. Such recessive genes characteristics include color blindness, birth defects, baldness, sexual immaturity, Downs Syndrome etc., but the chance is very low, 2-3% only. So there is a lot of better chance for the progeny to be healthy and if you have any doubts further, consult the nearest doctor for suggestions and counseling as well. Consanguineous marriage is widely practiced around the world. About 1/5th of the world population encourage this. So don't worry. Just seek the help of a professional before proceeding further.

    Good Luck.

    Thank You
    Dr. V. Shashikanth

  • According to an ancient time, people used to agree for such relations and they would marry but now biologically it is good if it is avoided. It can be avoided for future reasons like having children and many other health issues which occur duly after marriage. But as per I know the couple should not have the same blood group, this was asked and told to me by my doctor when I had a miscarriage a few years ago. She had mentioned one of the reasons for miscarriage is having the same blood group. But later when I searched in net I found that it all depends on the RH compatibility. I suggest you both consult a doctor and undergo some test regarding all this for your better future. The only problem may persist with your sexual issues and children that can be cleared by consulting and getting advised by your doctor. The other adjustment between couples depends on their mindset. Before you proceed to this relationship get a thorough medical checkup so that you both can be free from unnecessary tensions and can start your new life with happiness.

  • If your worry is only because of same blood group, then you just remove that worry. O positive is the most common blood group with more than one-third of population having O positive blood group.
    In many communities, girl marrying her paternal aunt's son is well accepted traditionally. For many things this was a convenient and comfortable alliance in early days.
    Both families know each other. There will be otherwise also mutual affection and sense of belonging due to the already existing relationship. In case of wealth assets, the same will be continuing within the close circle of the family. For the needs and help arising anytime, there will familial help available always. Hence such marriages were accepted and were common in those days.

    In your case if there are no known cases of serious illness or chronic ill health to the boy or his parents , there need not be any reason to worry. The same can apply to your side family also.

    Hence if all other factors including your mutual liking is there , from what is narrated in your question, my suggestion is, go ahead with confidence and trust.
    Best Wishes.

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