<prompt> Maximum permissible radiation dose in pregnancy is:0.5 rad.1.0 rad.1.5 rad.3.0 rad.  <response>: Ans. is a i.e. 0.5 radRef. Diagnostic radiology and Imaging by K. Subbarao, Jaypee publication, Christensens physics of diagnostic radiologyMaximum permissible radiation doseIs that dose which if received each year for a 50 year working lifetime would not be expected to produce any harmful effect?The maximum permissible dose for a pregnant woman is 0.5 rads in gestation periodAlso knowThe gestation period when the fetus is most sensitive to the effect of radiation -8-15 weeks of gestationThe10 day ruleThis rule advices that any x-ray examination involving the abdomen of a women of child -bearing age should be carried out within 10 days of the onset of menstruation. 