Sometimes in life we have to face very complicated questions. Especially when it comes to a new addition to the family. The question of "Who is the real biological father of this child?" can arise for many legal, social, and personal reasons. So at a time like this, the most accurate way to find a clear answer to it without any doubt, scientifically, is a DNA paternity test. Today we will talk about everything very simply.
What is a DNA test in simple terms?
To understand this, we first need to know what DNA is. The full name of DNA is `(Deoxyribonucleic acid)`. Simply put, DNA is like an instruction book containing genetic information inside the cells of our body. Everything from your hair color, eye color, height, and skin color is determined by the information contained in this DNA.
The important thing is that we inherit this DNA from our biological parents. To be precise, half of our DNA comes from our mother and the other half from our father .
Here's what a DNA paternity test does:
The child's DNA pattern is taken and compared with the mother's DNA pattern and the DNA pattern of the person suspected of being the father. If the part of the child's DNA that was not inherited from the mother matches that person's DNA, then he is most likely the child's biological father.
Why do you need to do such a test?
There are many reasons to get a DNA test. Some of the main reasons are:
- For legal purposes: Proof of paternity is essential for legal matters such as including the father's name on a child's birth certificate, obtaining child support, obtaining child custody, inheriting property, and receiving some social security benefits.
- For health reasons: Some genetic disorders can be passed down from generation to generation. For example, conditions like Cystic fibrosis and Down syndrome. Knowing who the biological father of the child is can help identify any genetic disorders that may be passed down from the father. This is very important for the child's future health.
- To know family history: A child has the right to know their family history and who their relatives are. It is very important for the child's psychological development and identity.
What types of DNA tests are there?
DNA testing can be done before the baby is born (during pregnancy) and after the baby is born. Here are some of the main methods used.
| Name of the test | Time to do it | How to do it and description |
|---|---|---|
| Cheek Swab | Any time after the baby is born | This is the simplest and most commonly used method. A swab is used to take a sample of cells from the inside of the cheek of the child and the suspected father. This is painless. |
| NIPP test (Noninvasive Prenatal Paternity Test) | After 8 weeks of pregnancy | This is a very safe method. A small amount of DNA from the baby in the womb is floating in the blood of the pregnant mother. In this test, a blood sample is taken from the mother and the baby's DNA in it is compared with the DNA of the person suspected of being the father. This is 99.9% accurate . |
| Amniocentesis | Between 15-20 weeks of pregnancy | This is an invasive test. In this test, a doctor inserts a very thin needle through the mother's abdomen into the uterus and takes a small sample of the amniotic fluid that surrounds the baby. This fluid contains the baby's cells. There is a very small risk of miscarriage associated with this test. |
| Chorionic Villus Sampling (CVS) | Between 10-13 weeks of pregnancy | This is also an intrauterine test, like amniocentesis. In this test, a small sample of cells is taken from a part of the placenta. This also has a very small risk of miscarriage or infection . |
The most important thing is that tests like `Amniocentesis` and `CVS` are only done when absolutely necessary, under the supervision of a doctor. Because there are small risks associated with these. The NIPP test is the safest method that can be done during pregnancy.
What should you do before the test?
Typically, if you are having a cheek swab taken, you are advised to avoid the following for about an hour before:
- Brushing teeth
- Using mouthwash
- Smoking or chewing tobacco
- If you are wearing dentures, remove them.
These things can affect the quality of the sample you take. If you are having a blood sample taken, your doctor will advise you to drink plenty of water and eat a healthy diet.
Truth or falsity about at-home DNA paternity tests
There are now online DNA testing kits that you can take home. These are usually less expensive than a test done at a medical center. Also, it is convenient because most people can do it in person.
But there are a few things you need to know about this:
- No legal acceptance: The results of a home test are not accepted as evidence in court or other legal proceedings. For legal proceedings, a test (`(Legal DNA Paternity Test)`) is required, which requires samples to be taken through a recognized medical center, according to the proper procedure (`(chain of custody)`), and in the presence of witnesses.
- Accuracy: It is important to check whether the company that sends the home test kits is an accredited company. Sometimes, errors in sample collection can affect the accuracy of the results. Tests are more reliable if they are performed in laboratories that are accredited by organizations such as the American Association of Blood Banks (AABB).
How do you understand the results?
The result of a DNA test is usually given as a "probability of paternity".
- If the result is 0%: This means that there is no genetic match between the alleged father and the child. He is not the biological father of the child.
- If the result is 99.9% or higher: This means that there is a very high probability that the person suspected of being the father is the biological father of the child.
Results usually take a few days to two weeks to come back. However, results from tests like `Amniocentesis` or `CVS` may take several weeks to come back.
Can't you do this test without Dad?
The best and most accurate method is to obtain a DNA sample from the alleged father. However, if he is not alive or cannot be found, a test can be performed using the DNA of his closest relatives. For example, DNA samples from the father's parents (the child's grandparents) and siblings can be taken and compared with the child's DNA to arrive at a conclusion.
Take-Home Message
- A DNA paternity test can confirm the biological father of a child with more than 99.9% accuracy.
- These tests can be done before the baby is born (during pregnancy) or after the baby is born. The NIPP test is very safe if done during pregnancy.
- For legal matters (court, maintenance, inheritance), a test conducted by a recognized medical center is absolutely necessary. At-home tests (`(At-home kits)`) are not accepted in court.
- Since there are very small risks involved in tests like `amniocentesis` and `CVS`, always talk to your doctor, understand the pros and cons, and choose the method that is best for you.
- If you have any questions, doubts, or anything to clarify about this, the best and most trusted person to talk to is your doctor.











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