paternity test

paternity test, also known as paternity test and paternity test, is a forensic living test to judge whether there is a biological relationship between disputed parents and children by applying the theory and technology of medicine, biology and genetics according to Mendel's genetic separation law.

Paternity identification is mostly required due to the following circumstances:

1. Unmarried pregnancy or family disputes suspect that the child is not his own;

2. Identify long-lost family members;

3, inheritance should determine the biological relationship, or the paternity of IVF;

4. It is suspected that the hospital has misadjusted the newborn baby;

5. Suspected of evading the family planning policy, taking one's own children as adopted children or raising a supernumerary child by others;

6. Immigration notarization needs to determine whether the required immigrant has a biological relationship with someone.

Method of paternity test:

1. The traditional paternity test is blood type test. Generally, children can only do it for more than 6 months, and they need a lot of blood samples. This method has complicated process, painful sampling and high error rate. Traditional blood type judgment has its role to some extent, but paternity test can not be identified according to blood type.

2. DNA paternity test. DNA paternity is taken from any tissue of human body (such as oral epithelial cells), and it can also be taken before the baby is born. This method is the most accurate one in the parent-child test at present-the accuracy rate can reach 99.99999%, and it is exquisite, simple, fast, economical and practical. The relative chance of paternity (RCP), according to the practice of paternity test at home and abroad, when the RCP value is greater than 99.73%, it can be considered that the father and the child have a biological relationship.

3. SNP detection. At present, DNA paternity uses the repetitive base sequence in human genome (STR as the second generation molecular marker) and PCR technology to identify individuals, but STR has great limitations. SNP is the third generation molecular marker technology, which is the future development direction, and it is used in the identification of 911 corpses in the United States.

Cost and time required for paternity test

At present, the charging standard in DNA paternity is about 3,5-5, yuan/case for less than three people, and the appraisal result can be obtained in two weeks, and the appraisal conclusion can be obtained in three days if there is special need.