1Role of ultrasound screening in the prevention and control of birth defectsCHEN Xin-lin800-8032Application of high throughput sequencing in prenatal diagnosisZHANG Jin-man, ZHU Bao-sheng804-8063Maternal-Infant outcomes and intervention strategies of common intrauterine infectionsYIN Yi-fei, ZHU Bao-sheng806-8114The prenatal genetic counseling of advanced maternal ageJIANG Yu-lin, LIU Jun-tao811-8145Prenatal screening, diagnosis and intrauterine therapy for twin pregnancy: referral is the keyZOU Gang, SUN Lu-ming814-8176Long-term oncoligical outcomes of laparoscopic and abdominal radical surgery for stage ⅡA1 cervical cancer:a real world studyCHEN Chun-lin, HE Fang-jie, LIN Li-hong, LI Wei-li, WANG Qian-qing, JIN Shuang-ling, YAO Ji-long, DUAN Hui, HUO Zhi-feng, LI Zhi-qiang, BIN Xiao-nong, LANG Jing-he, LIU Ping843-8497Value of high-risk cervical cytological abnormalities in colposcopy diagnosisZHAO Jian, GUO Wen-wen, DU Yi-shan, YANG Bo, WANG Ting-ting, MA De-yong, FENG Hui, HU Shang-ying850-8548Value of infectious index in diagnosis of histological chorioamnionitis in patients with premature rupture of membranesHUANG Ling, CHEN Xiao-bin, QIAO Chong855-8589Study on the incidence of fetal genome copy number variation in elderly pregnant womenWANG Hong-ling, WANG Ying, LIU Lu-yao, LI Shu-yuan, LI Tong, SUN Jing-xia859-86210Application of robotic surgical system in radical hysterectomy without lift combined with trans-vaginal tumor closure for cervical cancer at early stage: an analysis of 20 casesFU Zhen-hua, ZHANG Zhi, YANG Lei, ZHANG Qi-ling, CAI Li-ping863-86511Value of ultrasound-guided uterine aspiration in the treatment of cesarean scar pregnancyLI Hong-ye, JIANG Jing, LIU Ying, ZHAO Xin, SHAN Shu-zhi, SHI Bin866-86912Mini-incision laparoendoscopic single-site surgery for gynecological diseases : an analysis of 30 casesBAO Ming-yue, QIN Zhen-yue, CHEN Ji-ming, DONG Zhi-yong, WANG Hui-hui, CAO Ying, XIAO Hui-chao, ZHENG Ya-feng, JIANG Yun-fen, SHI Ru-xia870-87313Prenatal diagnosis of the super numeral Y chromosome fetus with 49, XYYYY karyotype and the review of literatureLAI Yi-jun, FENG Yan, YIN Yi-fei, ZHU Shu, WANG Lei, YANG Bi-cheng, LI Peng, ZHAO Qing-fen, LI Hai-chun, ZHU Bao-sheng, TANG Xin-hua874-87714A study of 50 cases on abnormal fetal ultrasonography findings and maternal serum markers from 50 cases of triploid fetuses at first and second trimestersLU Li-hua, WEI Hui, YANG Bi-cheng, CHAN Ying, YAO Li-min, ZHU Shu, HE Gui-lin, LI Dong-mei, LI Qi, HUANG Wen-ming, ZHU Bao-sheng, ZHANG Jin-man878-883 