Prophylactic anti D injection in non-immunized Rh negative women should be given at-

Ans: 4 Both 3 and 4 are accepted regimes. 4 is American recommendations 3 is the British Committee for Standards in Haematology (BCSH) recommendation along with NICE (The National Institute for Health and Care Excellence) approval. American college recommendations: Anti-D immune globulin is given prophylactically to all D negative, un-sensitized women at approximately 28 weeks' gestation, and a second dose is given after delivery if the newborn is D-positive Before the 28-week dose of anti-D immune globulin, repeat antibody screening is recommended to identify individuals who have become alloimmunized Following delivery, anti-D immune globulin should be given within 72 hours. British Committee for Standards in Haematology (BCSH) Guidelines: All D negative pregnant women who have not been previously sensitised should be offered routine antenatal prophylaxis with anti-D Ig (RAADP) either with a single dose regimen at around 28 weeks, or two dose regimen given at 28 and 34 weeks. The ONE best answer for this question however will be 4.This is from Williams which is more trusted and followed source of information.