TORCH is an acronym for a group of infectious diseases that can cause serious congenital defects and even fetal death, usually including Toxoplasma gondii (TOX), rubella virus (RV), cytomegalovirus (CMV), and herpes simplex virus (HSV). Although these microorganisms usually cause only asymptomatic or mild symptoms of infection in the infected mother, they can have serious consequences for the fetus. It is crucial to perform pregnancy tests or preconception tests for the health of the fetus.