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International Birth Defects Information System



DNA Testing for Other Situations

Testing: This is a common testing option. Although mother's sample is not necessary to perform paternity testing, testing on the mother is recommended.

Prenatal testing: This test is performed on two types of samples, amniocentisis and chorionic villis sampling (CVS), obtained by special procedures. The procedure for amniocentisis should be performed within thirteen to twenty four weeks gestation, whereas the procedure for CVS is performed from nine to eleven weeks. It is the responsibility of the client to seek medical advice concerning the performance of these procedures.

Grand Paternity and Kinship Analysis: When the alleged father is unavailable for testing, two testing options are available. Grand Paternity testing is recommended when both of the alleged father's parents are available for testing and there is no doubt as to his parentage. The other option, Kinship Analysis, is a more complicated test since the family relationships must be determined using fewer and more distantly related individuals, such as the child's aunts and uncles or brothers and sisters. It is possible using the most advanced of these testing methods to determine if two people are siblings, half-siblings or unrelated.

Newborn testing is performed on samples obtained by trained medical professionals during the cutting of the umbilical cord at birth. Clients should consult with their attending doctor prior to the delivery date.

Twin Zygosity is performed to determine whether twins are identical or fraternal. Samples are only required from the twins.

DNA Identity Testing is performed on children and high profile individuals to create a genetic identification profile, to be available in case of disappearance or foul play. This procedure is also performed to determine whether two samples are from the same individual.

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University of South Alabama
Birth Defects Genetics Center - Mobile, Alabama 36688-0002 / 251-460-7500
For questions or comments contact us or call toll free 1-800-624-1865
Date last changed: April 16, 2003 2:41 PM
http://www.southalabama.edu/genetics