Paternity Test by DNA Testing
The paternity test is a type of DNA test that aims to assess the degree of kinship between the person and his supposed father. This test can be done during pregnancy or after birth through the analysis of blood, saliva, or hair of the mother, child and alleged father.
The main types of paternity testing are:
- Test prenatal paternity: can be conducted from the 8th week of gestation through a small blood sample from the mother, since the DNA of the fetus can already be detected in the maternal blood, and comparison with genetic material from the alleged father;
- Paternity testing by amniocentesis: it can be held between the 14th and 28th of gestation by collecting the amniotic fluid that surrounds the fetus and comparison with genetic material from the alleged father;
- Paternity testing by cordocentesis: can be conducted from the 29th week of gestation through the collection of the blood sample from the fetus through the umbilical cord, and comparison with genetic material from the alleged father;
- Paternity test by vilo corial: can be held between 11th to 13th week of gestation through the collection of fragments of the placenta, and comparison with genetic material from the alleged father.
The genetic material of the alleged father can be blood, saliva or hair, however some laboratories recommend that it be collected 10 strands of hair removed from the root. In the case of the death of the alleged father, can be carried out a paternity test using blood samples from the mother or father of the deceased.
The price of the paternity test varies with the laboratory, can cost between R$2000 and R$4000,00. However, in some cases, the paternity test can be done for free through a court’s request that may be requested by a lawyer from the public defender’s office.
DNA testing is still in pregnancy
The DNA testing is still in pregnancy can be done from the 8th week of pregnancy by collecting the mother’s blood, in the DNA of the fetus can already be found circulating in maternal blood. However, when the DNA testing identifies only the DNA breastfeeding, may be required the new collection or wait a few weeks to be able to collect other material.
Usually in the 12th week of gestation, there may be the collection of DNA by means of biopsy of the vilosidade chorionic, in which a sample is taken from part of the placenta that contains cells of the fetus, being taken for analysis in the laboratory and compared with the genetic material of the alleged father. By around the 16th week of gestation can make the collection of amniotic fluid and by around the 20th week, the umbilical cord blood.
Regardless of the method used for collection of the genetic material of the fetus, the DNA is compared with the DNA of the parent is evaluated to the degree of kinship.
How is it done paternity test
The paternity test is done from the analysis of the sample sent to the laboratory, where they are carried out molecular tests that indicate the degree of kinship between the people who underwent the examination from the comparison of the DNA.
The result of the paternity test is released between 2 and 3 weeks, depending on the laboratory in which it is performed, and it is 99.9% reliable.
Where do the paternity test
The paternity test can be carried out autonomously or through a court’s request in specialized laboratories. Some labs that do paternity test in Brazil are:
- Genomic – molecular engineering -Phone: (11) 3288-1188;
- The centre of genomes -Phone: 0800 771 1137 or (11) 50799593.
It is important to inform at the time of the examination if any of the people was submitted to blood transfusion or bone marrow 6 months prior to conducting the test, because in these cases the result may be doubtful, being the most indicated to carry out the paternity test through the collection of saliva.