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Scope and precautions of drug testing strips
Screening in drug rehabilitation centers, hospitals, military conscription, high-risk population surveys, special industries, and recruitment physical examinations. Grassroots drug control agencies screen and retest drug users.
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Analysis of Mistesting of Early Pregnancy Test strips, detailed introduction
HCG usually appears in urine a few days after implantation of the fertilized egg, and a certain amount must be reached before it can be detected. Therefore, for women with normal menstrual cycles, it is necessary to delay menstruation before HCG can be detected in the urine. Women with long menstrual cycles or abnormal ovulation may only be detected after 40-44 days of amenorrhea.
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