Gynaecological Ultrasound & MRI — Practice

A 28-year-old pregnant woman at 32 weeks of gestation is referred for obstetric ultrasound. The sonologist notes that the placenta is completely covering the internal cervical os. The patient has had one previous lower segment caesarean section (LSCS). On colour Doppler, multiple turbulent lacunae are seen within the placenta with loss of the normal retroplacental clear space. The MOST likely diagnosis is: