<prompt> The dose of antl D gamma globulin given after. ; delivery for a Rh-negative mother and Rh baby Is:50 microgram200 microgram300 microgram100 microgram  <response>: Usually 300microgram IM is given after delivery to all non immunised Rh negative mothers.This will neutralise about 15 ml of Rh positive red cells or 30ml of fetal whole blood. TEXT BOOK OF OBSTETRICS,Sheila Balakrishnan,2nd edition,page no.310 