Antenatal imaging: A pictorial review

Figure 4 Subamniotic and retroplacental hemorrhage. A and B: Retroplacental hemorrhage. 18 wk pregnant, complaining of vaginal bleeding. On ultrasonography, there was a hypoechoic collection area (arrows) extending in a long segment posterior to the placenta (asterisk); C: Subamniotic hemorrhage, 12 wk pregnant, complaining of pain. On ultrasonography, there was a heterogeneous collection area (arrows) located anterior of the placenta, reaching 10 cm at its widest part (asterisk: Placenta); D: Subamniotic hemorrhage, 18 wk pregnant. On ultrasonography, there was a hypoechoic, minimally heterogeneous collection area (arrows) anterior to the placenta (asterisk: Placenta).