FREQUENCY OF PLACENTA PREVIA IN WOMEN WITH HISTORY OF PREVIOUS CAESAREAN AND NORMAL VAGINAL DELIVERIES
Abstract
Background: Placenta previa is known to be associated with previous caesarean deliveries, advancedmaternal age, increasing parity, smoking, curettage and myomectomy. This study was carried out to
compare the frequency of placenta previa, in women with previous caesareans versus those with normal
vaginal deliveries. Methods: It was one year study conducted at the Department of Obstetrics and
Gynaecology Unit B, Ayub Teaching Hospital, Abbottabad. One hundred women were included in the
study, 50 in Group A with previous caesarean deliveries, and 50 in Group B with previous normal
vaginal deliveries. Frequency of placenta previa in both groups was analysed. Results: Placenta previa
was found in one (2%) woman in Group A, and in two women (4%) in Group B. It was not found in
para 4 or less in both groups. One woman in Group A and two women in Group B with parity 4 or
more had placenta previa (p<0.05). None of the women with previous one scar had placenta previa,
while with previous 2 scars one had placenta previa (p<0.05). One woman with placenta previa in
Group A and both women with placenta previa in Group B were more than 25 years old. Placenta
previa was not found in women below 25 years of age. Conclusion: Previous one caesarean section did
not increase the frequency of placenta previa. Increasing number of scars, increasing maternal age
beyond 25 years and increasing parity beyond 4 were associated with placenta previa.
Keywords: Placenta, placenta previa, caesarean section, scar, vaginal delivery, parity
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