DNA blood testing is often referred to as parentage testing for fathers who are not 100% sure that the child is their child or not. This happens increasingly often in this day and age where some women will fall pregnant to other males, not their partner to keep their partner around. The problem here is that males are often trapped with a woman that has little or no respect for their partner and uses them as a means of income and support. The fleeting female will have herself impregnated on purpose or sometimes by mistake by a complete stranger and then inform their partner or previous partner that the child is theirs. Insecurity is another factor for this deed of misleading pregnancy because the female determines that it is now or never often without consulting the male partner.

Men can now fight back against these injustices by having their possible babies DNA matched with their own through DNA blood testing. It is a sure fire method of determining whether the child is his or not. The US immigration department used DNA blood testing to determine if a child born overseas is actually the biological sibling of the two parents and not just a baby that the parents have obtained on the children black market or through another means of adoption which many countries have very lenient views off. Adoption in some countries may not require paperwork or identification papers which mean that the US government has no knowledge of the origins of the child except through DNA blood testing.

DNA blood testing is more invasive than other methods of DNA testing because a needle is used to extract blood as opposed to a swab that takes skin samples of DNA. The DNA blood testing is said to be far more accurate than other forms of testing and therefore is still popular amongst people that are trying to establish parental lineage. DNA blood testing is done in laboratories under strict laboratory conditions so there is minimal chances of the wrong evaluation been given. DNA is extracted from the white blood cells after the blood sample is put into a centrifuge and the blood is split into different components.