(a)
(b)
(c)
(d)

Figure 1: T2-weighed magnetic resonance imaging at 9 (a, b) and 32 (c, d) weeks of gestation. (a) Bilateral pelvic masses with a horizontal view. A right-sided multilocular mass (arrow) and left-sided unilocular mass (asterisk) are shown. We suspected bilateral ovarian tumors at this point. (b) Sagittal view. The left-sided unilocular mass (asterisk) is shown. (c) Horizontal view. The right-sided multilocular mass (arrow) is involved in or at least is located very close to the large mass (star). (d) Sagittal view. The left-sided mass (star) occupies the pelvic cavity.