“…The median maternal age was 30 years (range, 18-41 years), and median gestational age at diagnosis was 25 weeks of gestation (range, 15-36 weeks). Twenty-four cases (24.7%) were diagnosed before 22 weeks of gestation, the period in which a termination of pregnancy is legally permitted in Japan [17]. Eleven pregnancies were terminated before 22 weeks of gestation, and 86 cases intended to deliver (Fig.…”