Objective: Bombay blood group though rare poses a challenge in managing obstetric emergency both for the mother and obstetrician .Mandatory screening for blood grouping and typing including rare group is the standard of care. Material: Out of 18300 women attending to our antenatal clinic during January 2007-December 2007, two cases of Bombay phenotype were detected during routine antenatal profile. One case of Bombay phenotype blood group was identified with complete inversion of uterus and post partum haemorrhage in shock in an emergency admission. She was managed with 4 units of O group blood prior to manual repositioning of the uterus under anesthesia..