Semen Detection Test



Semen Detection - This type of test is typically performed on a garment, undergarment or other item (pantiliner, etc.) when a person suspects his partner of infidelity or other sexual activity.  The results indicate whether the item is positive or negative for the presence of semen.  This type of test is NOT a DNA test.  It determines whether there is a presence of semen on a garment or item.  It does not determine whether DNA is present, if there is enough DNA, or if there is usable DNA.  If the garment or item test positive for the presence of semen, the next step to pursue is a DNA DETECTION TEST (as explained below).


The testing method utilized in our Semen Detection Test is Prostate Specific Antigen (PSA), which is a confirmatory test.  The detection of PSA on forensic samples is often helpful since it will confirm the presence of semen unless the samples involving a vasectomized or azospermic individuals.  (Other methods often utilized are Microscopic Inspection which looks for sperm, not semen; and Acid Phosphatase (AP) which is a presumptive test and can test positive for substances other than semen.)



DNA Detection Test - This test detects whether DNA is present in the sperm, and it also indicates whether there is enough usable, viable DNA for comparison.  This type of test will detect DNA from the female wearing the garment or undergarment, as well as the DNA from semen found on the garment.  Testing can be done which will only detect the male DNA and disregards any female DNA -- SEE DNA DETECTION TEST, YSTR.



If the DNA is viable, we could then compare the DNA profile from the sperm to your DNA, in order to confirm that the sperm is or is not from the same person. We will then send you a DNA kit with which you will collect you own DNA sample. The comparison takes 5 working days and are 99.99% accurate.


DNA Detection Test, YSTR - This test detects whether male DNA is present and disregards any female DNA on an item or garment.  It also will indicate whether there is enough usable DNA for comparison.  In the event a female has had sexual relations with the close male biological relative of a spouse or boyfriend, it may not be possible to distinguish the male DNA from those of the spouse/boyfriend and their relative (brother, father, grandfather, close cousin). 


Differential Extraction Test - This test separates male DNA from female DNA.  It cannot separate males from males or females from females.