1Study Progress on Circular RNA in Female Reproductive System MalignanciesDU Meng-yang, WANG Hai-jiaoResearch on Gynecological Mailgnancies485-4882Diagnosis and Treatment Advances in Uterine Serous CarcinomaLIU Jun-xiu, HE Mian, YAO Shu-zhongResearch on Gynecological Mailgnancies489-4943Systemic Treatment of Uterine LeiomyosarcomaLUO Pan, SHEN Yan, HUA TengResearch on Gynecological Mailgnancies495-4994The Assessment and Treatment Status of Lymph Node Metastasis in Endometrial CancerLI ZhuangResearch on Gynecological Mailgnancies500-5035Advances in the Omentextomy of Epithelial Ovarian CancerDONG Xu-hui, YAO Liang-qingResearch on Gynecological Mailgnancies504-5096Research Progress of Circulating Tumor Cells in Epithelial Ovarian CancerAN JianResearch on Gynecological Mailgnancies510-5147Different Scoring Methods in Predicting Respectability and Prognosis in Advanced Ovarian CancerZHANG Yue-ruResearch on Gynecological Mailgnancies515-5228Approach on Treatment of Vaginal Intraepithelial Neoplasia after Total HysterectomyCHEN Yan-qin, HONG Xin-ruResearch on Gynecological Mailgnancies523-526,5369Research Progress on the HPV Preventive Vaccine of Cervical CancerJIANG Bo-lingResearch on Gynecological Mailgnancies527-53010Clinical Characteristics of 7 Cases with Small Cell Carcinoma of the Ovary-hypercalcemic TypeWANG Yao, YANG Jia-xin, YU Mei, CAO Dong-yan, ZHANG Ying, SHEN Keng, GUO Li-naResearch on Gynecological Mailgnancies531-53611Research Progress of COX-2, E-cadherin and PPAR-γ in Pre-eclampsiaZHANG Na-naObstetric Physiology & Obstetric Disease541-543,54812Research Progress of Biological Pathway Synergistic Effect and Premature Rupture of MembranesLIU Wen-cui, BAI Yu-fang, MU Wan-ru, LU Li, QI Cun-xiu, WANG Rong-huaObstetric Physiology & Obstetric Disease544-54813Application of Abdominal Aortic Balloon Occlusion in the Cesarean Section for Patients with Pernicious Placenta PreviaDING NanObstetric Physiology & Obstetric Disease549-55214Risk Factors of Pelvic Organ Prolapse for Unipara after Vaginal Delivery in Early PostpartumLU Bang-chun, ZHANG Lin-na, ZHANG Chen, FAN Jian-xia, XU HongObstetric Physiology & Obstetric Disease553-55615Clinical Value of Fetal Echocardiography on High Risk Pregnancies between 11 and 16 Weeks' GestationLI Hui-dong, TIAN Zhi-yun, ZHANG Zhi-kunObstetric Physiology & Obstetric Disease556-559,57016Analysis of Influencing Factors of Delivery Time and Delivery Mode Selection in Pregnant Women with Scarred UterusHUANG Cui-lian, WU Xuan-hua, LAI Dong-meiObstetric Physiology & Obstetric Disease560-56317Placenta Implantation Resected by Laparotomy Complicated by Fistulas:A Case Report and Literature ReviewLIN Kai-xuan, YANG Lin-dong, HAO Qun, SHUI Ying-chun, WU Yuan-zheObstetric Physiology & Obstetric Disease563-56718Research Progress of Endometrial Cell ExosomeYANG Hong, LI Jia, HU Tian-qiGynecological Disease & Related Research574-57819Research Progress on the Effects of Th1/Th2 Balance Regulation on Gynecological and Obstetrical DiseasesYANG Hua, ZHAO LuGynecological Disease & Related Research579-581,60020Influence of Education Level and Fertility on Women's Perimenopausal SymptomsWU Hong-yan, ZHANG Zhi-fen, WEI Shuang-shuang, HE Yi-ran, JIA Cen-lin, HUANG JianGynecological Disease & Related Research582-586 