Pulmonary Artery Doppler and Neonatal Outcome in Placenta Accreta Spectrum Patients

"A full obstetric ultrasound scan will be performed to assess signs of placental invasion, to document fetal biometry, estimated fetal weight, amniotic fluid index, assess fetal lung maturity parameters as pulmonary artery Doppler waveforms, amniotic fluid free floating particles, bowel echogenicity, fetal epiphyseal ossific centers, liver/lung echogenicity and kidney length.~Pulmonary artery Doppler: Fetal echocardiography will be done. Pulmonary artery Doppler flow waveforms, including pulsatility index, resistance index, systolic-to-diastolic ratio, peak systolic velocity, and acceleration time to ejection time ratio will be measured in the main pulmonary artery."