ABSTRACT
Physiological variations in the blood group distribution in different parts of the world or different races in the same country are commonly observed. The present study has been carried out to evaluate the distribution and pattern of different blood groups in this part of the country [SINDH] and it is compared with the distribution of blood groups in other countries and also in different cities of Pakistan. The results show that in our population blood group "B" is more common and constitutes 30% of total population while it is very low in U.S.A. and England population. The incidence of glood group "A" in U.S.A. and England is more than 40% whereas incidence of group "A" in our study less than 25%. In conclusion we found that our results are different from the results of U.S.A. and England but are very close to the studies carried in different parts of the country and also in India