<prompt> Dose of anti D in ectopic pregnancy -50 mg100 mg150 mg300 mg  <response>: Ans. is a i.e., 50 mg o In Rh - negative women not yet sensitized to Rh antigen, anti - D gamma globulin - 50 microgram if gestation 12 weeks or 300 microgram if 12 weeks i.m. is administered soon following operation to prevent isoimmunization.Anti - Do It is an IgG antibody that is given by i.m. route.o It binds to fetal RBCs so that they cannot stimulate the maternal immune system.o It should be given at 28 weeks to all unsensitized Rh - negative mother and postpartum within 72 hours if the babys blood group is Rh positive.o It should also be given after abortion, MTP, and ectopic pregnancyo Indications and Recommended Dose of Anti - D:IndicationsRecommended Dose pgFirst trimester abortionMTP50First trimester ectopic pregnancy50Second trimester abortionMTP300Second trimester amniocentesis300Prophylaxis at 28 weeks gestation300After delivery300 