The second important finding of our study pertains to
the association between previous caesarean delivery and
increased risk of abruptio placentae. The risk of abruptio
placentae increased by nearly 2-fold for women with
prior caesarean section delivery. Similar observation was
reported elsewhere [18–20, 30], but in our study was lower than the seven and ten-fold reported by Wandabwa
et al. and Nayama et al. [22, 31]. The increased
risk of abruption among women with prior caesarean
delivery may imply that these women had ruptured scar
from the previous caesarean. The differences in risk of
abruption placentae between our study and those of
others may be explained by the differences in preexisting
conditions which are associated with abruptio
placentae between the studied populations.