This study comprises two designs the first one is a community-based descriptive cross-sectional qualitative study conducted in Saudi and Alshikh Mohamed Ali Fadul Hospital in Omdurman, Sudan as well asNajran University Hospital, Kingdom Saudi Arabia (KSA)to study theimpact of maternal age and parity in incidence of placenta previa. The aim of the study, to correlate the maternal age and parity with placenta previa. The relationship between age and parity in Sudan and KSA. The Pearson correlation 0.718 in Sudan is strongly and 0.249 in KSA its middle level correlation and P value 0.000 is significant in both countries . The correlation between age and parity with placenta previam, showed a positive Pearson Product Moment correlation of between 0.257 for age andplacenta previa(PP) in Sudan and 0.071 in KSA. This relationship is quite high, which suggested a fairly strong relationship in Sudan and weakly in KSA may be to a few number of age group patient between 30 and 40 years and older which is common related to placenta previa (PP). The correlation is significant at the 0.05 level (2-tailed). The conclusion of the study, thematernal age and parity represent the impact factor of incidence ofplacenta previa (PP).