DNA Paternity Testing

Type of paternity testing :

Postnatal (after child’s birth) DNA testing
-Blood collection and testing
-Buccal swab (cheek swab) collection and testing
-Umbilical cord collection and testing
-Other sample collection and testing (semen, tissue, hair etc.

Prenatal (before child’s birth) DNA testing
-Amniocentesis
-Chorionic Villus Sampling

Blood Testing :
-Blood-typing system : ABC typing
-Involve the presence of antigens on the red blood cells
-A allele – dominant
-B allele – dominant
-A allele and B allele – codominant
-O allele - recessive

Check out the blood types ABC explained from this website :
http://www.dnatesting.com/resources/aboBloodTypes.php

Buccal Swab :
-Sample for DNA test
-collected using the painless and simple buccal swab
—similar to a cotton-tipped swab rubbed against
*the inside cheek of the test participant, and

*loose cheek cells adhere to the swab.

Amniocentesis :
second trimester
14th-20th weeks of pregnancy
uses ultrasound to guide a thin needle into your uterus, through your abdomen
needle draws out a small amount of amniotic fluid
small chance of harming the baby and miscarriage
side effects may include
Cramping
leaking of amniotic fluid
vaginal bleeding.

Chorionic Villus Sample
10th-13th weeks
consists of a thin needle or tube which a doctor inserts from the vagina, through the cervix
guided by an ultrasound, to obtain chorionic villi.
little finger-like pieces of tissue attached to the wall of the uterus.
chorionic villi and the fetus come from the same fertilized egg
have the same genetic makeup.