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Semen finger print.

S H Doss1, N A Louca

  • 1National Research Center, Dokki, Cairo, Egypt.

Forensic Science International
|October 1, 1991
PubMed
Summary
This summary is machine-generated.

The testosterone (T) to dihydrotestosterone (DHT) ratio in seminal fluid is unique to each individual. This finding validates the T/DHT ratio as a reliable method for semen identification in forensic science.

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Area of Science:

  • Forensic Science
  • Andrology
  • Biochemistry

Background:

  • Testosterone (T) and dihydrotestosterone (DHT) are androgens crucial for sperm maturation.
  • Seminal plasma composition, including the T/DHT ratio, varies significantly between individuals due to contributions from the prostate, seminal vesicles, and the epididymo-testicular unit.

Purpose of the Study:

  • To evaluate the utility of the T/DHT ratio in seminal plasma as a method for individual semen identification.
  • To validate the T/DHT ratio as a forensic tool for matching semen samples.

Main Methods:

  • Analysis of testosterone (T) and dihydrotestosterone (DHT) levels in seminal plasma samples.
  • Correlation of T/DHT ratios from coital and masturbated semen.
  • Analysis of consecutive coital semen samples.

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Main Results:

  • A distinct correlation was observed between testosterone (T) and dihydrotestosterone (DHT) levels in seminal plasma.
  • The T/DHT ratio was found to be heterogenous across individuals, influenced by male accessory sex glands and the epididymo-testicular unit.
  • The T/DHT ratio was confirmed to be specific for each individual, demonstrating its potential for semen identification.

Conclusions:

  • The T/DHT ratio in seminal plasma is a unique biological marker for individual identification.
  • This steroid ratio serves as a valuable and validated tool for forensic semen identification, aiding in matching samples in legal investigations.