Currently the easiest and most efficient way to obtain DNA for a paternity test is to obtain oral epithelial cells by swabbing, some laboratories still take blood samples that are placed on FTA cards. However, many times it is not possible to obtain these samples and it is necessary to access the DNA using other samples such as: hair, nails, toothbrushes, semen, etc. These types of samples are called unusual samples.
Depending on the type of sample, it will be possible to know how easy it is to obtain DNA. For this, it has been classified into categories according to the complexity of obtaining DNA and the price of the test varies.
Category A
90% or more chance of obtaining DNA
bone marrow
Blood or filter paper
Semen
Category B
60-90% chance of getting DNA
blood stain on cloth
finger nails/nail clipping
diabetic test strips
Tissue (muscles, organs); not embalmed
swab with opium wax
deceased fetus
semen stain on cloth
Umbilical cord
Category C
60% or less chance of getting DNA
hair with root
Razor
cigarette butt
chewing gum/chewing gum
Mucous membrane
Condom
Tissue sample; paraffin embedded
Toothbrush
soda can/glass cup/plastic container or container
tampon/pad
straw
envelope flap
embalmed tissues
