good evening sir ,a doctor detected a tb to my sister , and say to take test pcr , so i would like to know that pcr test require only first day mensturation blood or it can be tested on other days of mensturations. please reply me on  YYYY@YYYY
Hello, THX to contact us. I understand your concern. If I am your doctor I advise you that it is preferable to give first day blood for Tuberculosis detection. But if your Menstrual bleeding is already started, you can give other day blood also. I will be happy to answer more of your concerns, kindly know me, Wish you a very good health at Chat Doctor. Chat Doctor. Infectious Disease.