Retrospective validation of 11–13 weeks’ gestation ultrasound characteristics as predictive tools for twin-twin transfusion syndrome and selective intrauterine growth restriction in monochorionic diamniotic twin pregnancies

Yin-Di Zhu, Jin-Yan Bian, Yu-Ping Liao, Ting Hu, Ming-Yue Wang, You-Guo Chen, Mei-Fang Pan, Xin-Xian Gu