<prompt> All predisposes to isoimmunisation in a Rh-ve female except.Advaned maternal ageAntepartum haemorrhageCaesarian sectionPostdated pregnancy  <response>: Ans. is a i.e. Advanced maternal age Following are the conditions predisposing to isoimmunization in Rh-ve femaleabortionchorionic villous samplingamniocentesisantepartum Haemorrhage attempted versioncaesarian sectionmanual removal of placenta Recent studies state that there is continuous feto-maternal bleed occurring throughout normal pregnancies. So it is not advisable to go beyond the expected date of pregnancy. Hence postdated pregnancy is another risk-factor for isoimmunization. 