Paternity issues
Parentage, especially paternity
Misattributed paternity rates and non-paternity rates
Paternity test statistics don't show the rate of paternity fraud
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Paternity tests for peace of mind
Some links to paternity testing services
Paternity testing fallacies
Paternity fraud
Other material:
Infidelity testing - technologies and services
Wives & female partners who "conceive away"
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Some papers on this website on the subject of paternity testing:
"The truth is out there" - Commentary on "Move to outlaw secret DNA testing by fathers"
"Knowledge is bliss" - Towards a society without paternity surprises
What is the crime if men seek confirmation that children are theirs?
"A matter of opinion" - Unofficial paternity tests and the impacts on children
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Infidelity testing - technologies and services

This is largely out-of-scope for this web site, because this web site is about child support, so needs children, not just an affair! However, it is a useful indication that the world is changing for ever, and the next generation will see things in a very different way. (Some readers may already have been "found out" and not know it!)


For some time, it has been possible to use a scientific infidelity testing service, at a considerable cost. One or two are identified in the links below. They work on the principle that after sex, both men and women leak semen into their clothes, especially their underwear, and this can be detected. The chemical detected is in the semen, not the sperm, so it is present even if the man has had a vasectomy.


In 1999, the technology took a major step "forward". One example was a product called "S-Check" which appeared in Japan. It tested semen on clothes. It was reported as being for use by women to test whether men had recently had sex, but judging by CheckMate, below, it would probably work the other way round too.

Another product also launched in 1999 was called "CheckMate" (tm). It became prominent in the UK towards the end of 2001. It is now on sale in several countries in the world, over the Internet and possibly in pharmacies too. It too is a home test kit for semen on clothing. It enables people to test whether their partners have had sex in the last few hours. If the person doing the test has not had sex with the partner - the implication is obvious! The test takes just a few minutes, is non-destructive, and leaves no traces. So the partner typically won't know that he or she is being tested, and typically won't know that he or she has been "found out". There are various offers, with various reductions for bulk purchases. Assume perhaps typically £20 or more for a single-test kit, reducing per-test for multiple test kits. There are options to have the kit delivered to addresses other than your own, and to have the credit card debited to a company that doesn't appear to be an infidelity-testing company.

At least one other product has been promoted - "Chective". However, I have been informed that it is no longer being sold for legal reasons.


CheckMate (tm) Others
About CheckMate Services
Around the world with the CheckMate 5 Minute Infidelity Test Kit Identigene - Semen Detection
Frequently Asked Questions about CheckMate The Spy Connection - Fidelity Lab Testing
Australia Genetic Technologies, Inc
GetCheckMate Pty. Ltd - CheckMate DNA Testing Place Marital Infidelity
Brazil Products
Kit para Teste de Infidelidade Checkmate Chective (tm)
  2TimerTestKit (from Quest Genetics)
DNA Plus - CheckMate News - CheckMate "'Undie-cover' wives catch cheating husbands" (BBC Asia-Pacific, 1999-06-17) - CheckMate "Aerosol Fidelity Check" (New Scientist, 1999-06-19) - CheckMate "When a cheating partner means getting your kit out" (Sunday Herald, late 2001)
Lie Busters - CheckMate "Private investigations" (Guardian 2001-11-15, Sharon Krum)
  "Checkmate" (DIVORCE, 2001-11-19)
  "What ever happened to trust?" (The Garden City Telegram, 2001-12-11)
  "New semen tracer stains more than reputations" (Mainichi Daily News, 2002-05-04, Mark Schreiber)
Seen on a CSA form:
" I am unsure as to the identity of the father of my baby, after all when you eat a can of beans you can't be sure which one made you fart"
Page last updated: 27 August, 2005 © Copyright Barry Pearson 2003