How does forensics know the difference between period blood and crime scene blood under the light?

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How does forensics know the difference between period blood and crime scene blood under the light?

In: Chemistry

Forensic analysis was done by performing confirmatory test of normal blood using Teichmann reagent which gives negative result with menstrual blood can be a good parameter for differentiating the menstrual blood from normal blood.

Period blood isn’t all blood, a large proportion of it is the old uterus lining that is shed every months if the woman isn’t pregnant


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