Related Factors of Placenta Accreta Spectrum in Women with Repeat Caesarean Deliveries and Its Effect on Pregnancy Outcomes

Placenta Accreta Spectrum (PAS) is an abnormal attachment of trophoblastic tissues to the uterine myometrium. It is a dangerous pregnancy complication and one of the leading causes of maternal morbidity and mortality. PAS may induce serious complications such as postpartum haemorrhage (PPH) and hysterectomy. Prior caesarean delivery and placenta previa are the major risk factors of PAS. The rate of caesarean delivery (CD) without medical indication has been raised in recent years. In the current study, we evaluated 142 women with a history of prior CD and divided them into two groups. Eighty-five patients had prior CD and PAS in their current pregnancy (case group) and fifty-seven patients had prior CD without PAS (control group). Demographic data and past gynaecological history, such as placenta previa, were collected. We found the prior CD and placenta previa increase the risk of PAS significantly. PAS was associated with more emergent caesarean deliveries and hysterectomies. We didn`t find a significant association between prior hysteroscopies and curettages with increased risk of PAS.