1Study on the correlation between the heterogene-ity of clinical presentation and pathogenesis of preeclampsiaWANG Yi-nan, LI Xiao-tian138-1412To reduce stillbirth rate:pay attention to etiolo-gy analysis,screening and preventionLIANG Jing-ying, CHEN Jing-si, CHEN Dun-jin141-1453HELLP syndrome without preeclampsiaHE Ying-dong, CHEN Qian145-1494Causes of preterm prelabor rupture of the mem-branes and the prevention and managementZHANG Qin-jian, YAN Jian-ying149-1535Thrombotic microangiopathy encountered in ob-stetricsLAI Wei-si, DING Yi-ling153-1576Whether an autoimmune disease is discovered in obstetrics department or first diagnosed dur-ing pregnancySONG Yi-jun, LIU Jun-tao157-1617Cause of secondary uterine contraction hemor-rhage,joint treatment and DIC prevention and controlZHANG Guo-hua, SHEN Xue-yan, CUI Wen-hua161-1648Analysis of factors for the occurrence of preterm premature rupture of membranes after fetoscopic laser coagulation in twin-twin transfusion syndromePENG Yu, YIN Shao-wei, LIU Jia-xin, LIU Cai-xia191-1959Effects of resistance exercise on metabolic parameters in late pregnancyZHOU Yu-heng, CHEN Rong, HU Hai-bin, GUO Jing-jing, WEN Ji-ying, NIU Jian-min196-20010Application of modified laparoscopic radical trachelectomy in cervical cancer for fertility preservationXU Miao-chun, HUO Chu-ying, WU Bin, LING Xiao-ting, XU Guo-cai, LIN Zhong-qiu, LU Huai-wu201-20511Surgical management of ovarian cysts of different sizes and types under transumbilical single-port laparoscopeZHU Chun-yu, ZHANG Yu-quan, LI Ji, GAO Sai-nan, JIN Bei-bei, DING Xiao-ying, YANG Xiao-qing206-21012Relationship between subclinical hypothyroidism and lipid metabolism in pregnancyLI Jing-jing, XU Ya-juan, CAI Yan-jun, ZHANG Miao, SUN Zong-zong, WANG Biao, BAN Yan-jie, HOU Xiao-feng, OU YANG Qian, HAO Ying-qi, WU Bo211-21513Cognition of medical staff on the issues related to surgical smoke in gynecological operationsFENG Xiao-xiao, DING Bo, XU Jing-yun, REN Mu-lan, SHEN Yang216-21814Analysis of the efficacy,safety and economy of Kangfuyan capsule combined with antibiotics for pelvic inflammatory diseaseLU Si-qi, WANG Wei, ZHOU Jia-meng, PAN Jie, ZHU Wen-tao219-22215Treatment effect and pregnancy outcome of polycystic ovary syndrome complicated with atypical endometrial hyperplasia by different treatment methodsYANG Kun, MA Xiao-xin223-22616Clinicopathological characteristics and prognostic factors of Normal sized Ovary Serous carcinomaWANG An-na, LONG Zai-qiu227-231 