The “torch” test is a group of tests related to intrauterine infections in women, where t stands for toxoplasmosis, o for other pathogenic microorganisms such as syphilis and herpes zoster, r for rubella virus, c for cytomegalovirus, and h for herpes simplex virus. The “torch” test, which is a test for these five pathogenic microorganisms, is a routine test for infectious diseases of the reproductive system before or during a woman’s pregnancy. These pathogenic microorganisms can cause infection in mother and child, resulting in abnormal fetal development and abnormal pregnancy outcomes such as premature birth, miscarriage, stillbirth or fetal malformation.