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Frequently Asked Questions About Semen Detections

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Frequently Asked Questions About Semen Detections

There is semen on my wife's panties and it's not mine, how do I test it?

Having tested hundreds of non clothing items for semen such as shower drains, wood chips, carpet, condoms, pizza, hair, spit in baggies and cups, finger wiping on tissues, floors, combs and brushes, food wrappers, feminine pads and tampons, band aids, fistulas from medical procedures, bed linens, bed posts, wash cloths and towels, tooth brushes, just to name a few, these items account for a fraction of the number of tests performed on underwear.  All items above account for less than 2% of  the items we test.

Ninety-eight percent (98%) of our serology tests were performed 
on panties, feminine pads and male underwear. 

SSDI is the most experienced private serology test lab for infidelity testing.  We remain on the forefront of technology by developing new products and processes.  Having developed the first non-presumptive semen detection kit in 2002 to our current validation of a specific sperm protein marker to specify the presence of sperm in a sample (even when badly degraded), you are guaranteed the most accurate and conclusive testing available.  

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How do I package the item?

Most panties will fit in a #10 envelope

Most male underwear will fit in a 6x9 envelope or a paper bag

Let cloth samples dry at room temperature before sending.

Mark each envelope or bag the following (when available):

Description of item

Date worn

Date obtained

If you are sending in your wife's panties, specify if you are a potential contributor and any useful information such as when was the last time you had ejaculated in her, and if you have had a vasectomy

If you are sending in your husband's underwear, specify if you are a potential contributor (from intercourse or handling of the stains) and any useful information, such as if he has had a vasectomy

Do not place any paperwork in the same envelope or bag holding the article. Due to cross-contamination issues, the paperwork will not get read until the test is underway.

Detail your thoughts and information.  We have tested many articles where the spouse admits later that the article was licked to try to determine the content of the stains.  We need this information.

Many items contain evidence of home semen tests.  Provide the name of this test on your envelope or bag.

How old of a sample can you test?

Why are you the only private lab offering saliva detections as part of your semen detection?

I ran a home AP test and got negative results. 

I was told that a black (UV) light could be use to detect a semen stain.

A black light can be helpful in locating biological stains for testing.  

No expert can look at a random set of stains and tell you which one is semen.

We use an expensive selectable multi-band UV forensic lamp to fluoresce each article before the extraction is accomplished so that we obtain sampling from every stain.  Then we follow that with another unit that provides an exact 450 nm wavelength, combined with special orange glasses, which makes invisible semen stains visible.

The $10 black lights sold on the internet are better than nothing...but not much.  If you are getting one free with your home kit, expect the cost to the supplier to be between $2.50 and $5.00. 

I purchased a SSDI laboratory test with positive results or I am 100% positive I have semen/sperm from another lab or PSA home test.

How do I identify the male contributor when the sample (such as tissue or garment) I have consists of semen/sperm only and was not contaminated by the female presence (such as vaginal discharge from panties or a feminine pad)?

You would order a PowerPlex DNA extraction from semen/sperm or the complete PowerPlex sperm determination.

How do I identify the male contributor when the sample (such as panties or feminine pad) consists of semen/sperm and probable contamination from a female but I am only trying to identify the male contributor?

You would order a YPLEX DNA extraction from semen/sperm or the complete YPLEX sperm determination.

How do I identify the male and female contributor when the male contributor is not vasectomized or I am not sure if he has a vasectomy (panties, feminine pad, oral sex stain, or a condom)?

You would order a differential lysis which will provide a separate PowerPlex profile on the male and female if the male is present by sperm cells and the female is present by epithelia  or buccal cells.  A differential lysis consists of 2 separate tests.

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