1The clinical anatomy basis of obstetrics and gynecology surgery——the three-dimensional ring around the cervixCHEN Chun-lin, DUAN Hui31-352Anatomical key points of transvaginal vesicovag-inal fistula repairSONG Lei35-373Key anatomies of radical hysterectomyLI Yuan, XIANG Yang37-394Anatomical issues that should be noted in para-aortic lymphadenectomyLU An-wei, ZHOU Li40-425Anatomical issues to be noted during pelvic lymph node dissectionLIU Kai-jiang42-466Anatomy of the sacral region related to sacral surgeryLIU Ping, SHEN Li-fan46-497Anatomical differences between robot assisted laparoscopic and laparoscopic endometrial can-cer surgeryLI Fang-mei, ZHANG Yi49-528How to avoid ureteral injury anatomically in to-tal laparoscopic hysterectomyZHANG Qing-quan, WANG Shi-jun53-559Anatomy and key points of cesearean section with placenta accreta spectrum disordersKONG Ling-ying, YANG Hui-xia56-6110Anatomical basis for hemostasis by surgical su-ture in postpartum hemorrhageCHEN Gong-li, QI Hong-bo61-6411Anatomical issues to be noted during gynecologi-cal accessory surgeryLI Su-fen, XIE Rong-kai64-6512Value of the intrapartum progression parameters measured by transperineal three-dimensional ultrasound at the active stage of labor in predicting delivery mode and time to deliveryYOU Hai-ying, LUO Man-ling, YIN Ai-lan, WANG Xue-fei, GUO Xiao-yan, ZHONG Mei110-11413Clinical efficacy and safety of allylestrenol in the treatment of perimenopausal abnormal uterine bleeding with ovulatory disordersJIA Qiu-cheng, TANG Hui-min, CHEN Ji-ming, CHEN Wan-ying, YU Yi, WEI Wei-wei, CAO Ying, LIU Jun-ling, XUE Wen-peng115-11814Expression of HDAC2 and p21 in epithelial ovarian carcinoma and its correlation with the clinical parametersNING Ni-ya, JIN Shao-ju, HE Zhi119-12215Correlation analysis between vaginal microbiota characteristics and peripheral blood immune factor levels in cervical lesions based on 16S rDNA sequencingSUN Yan-ting, YANG Li-yun, CHENG Chen-chen, MENG Fei, LIU Shi-yu, WANG Juan, DING Hong-mei, ZHANG Hong, CHEN You-guo, ZHOU Jin-hua, SHEN Fang-rong123-128 