Anti-D immune globulin has been advocated for use in appropriate patients since the 1970s. Historic data showed that 0.1ml of fetal D+ blood was all that was required to potentially sensitize an Rh negative mother. New data is questioning whether this prophylaxis is required in all cases of threatened miscarriage/abortion in early pregnancy, or if a more selective approach is appropriate. In this episode, we will highlight a soon to be released “Questioning Clinical Practice” commentary from Obstet Gynecol (the Green Journal) tackling this issue. Is it time to change our current and standard practice?