New Jersey signed a bill into law on Wednesday requiring all pregnant women to be tested for HIV, unless they object. The law also requires newborns be tested if the HIV status of the mother is unknown. Michigan, Arkansas, Texas and Tennessee have similar laws to New Jersey regarding the testing of pregnant women. Only New York, Connecticut and Illinois currently have mandatory testing of newborns. The measure is meant to decrease the number of newborn infections by prescribing HIV positive mothers antiretroviral drugs and delivering by C-section.