CONTENTS IN BRIEF Editorial Present and future of studies on endometriosis (part two) LANG Jing-he Clinical Research of Endometriosis Effect of triptorelin and an extended-interval dosing regimen in the treatment of patients with endometriosis and adenomyoma LIU De-yan, GU Mei-jiao, SHU Jia-zhen, et al Intermediate and long term clinical effects of uterine arterial embolization in treatment of adenomyosis CHEN Chun-lin, LIU Ping, ZENG Bei-lan,et al Effects of levonorgestrel-releasing intrauterine system on pain and recurrence associated with endometriosis and adenomyosis DENG Shan, LANG Jing-he, LENG Jin-hua, et al Analysis of relative factors influencing recurrence of endometriosis after operation treatment ZHAO Xuan, LIU Jun-Li, CHEN Shi-rong, et al Clinical Research Screening for G1528C mutation in mitochondrial trifunctional protein gene in pregnant women with severe preeclampsia and new born infant WANG Rong, YANG Zi, ZHU Jin-ming, et al Expression and significance of metallothionein in the placenta of women with low level lead exposure during pragnancy MA Hai-yan, LI Hong, WANG Jiao-chen,et al Correlation of adipocytokines and insulin resistance in normal pregnancy YU Song, ZANG Chun-yi, ZHANG Wei-yuan Exploration of the classification of polycystic ovarian syndrome LIN Jin-fang,LI Xin, ZHU Ming-wei Fluid-based thin-layer method for screening of squamous intraepithelial lesions in pregnant women WU Xia, HUANG Xing-hua Management and prognosis in stage Ⅳ gestational trophoblastic neoplasia patients YANG Jun-jun, XIANG Yang, WAN Xi-run, et al Meta-analysis of uterine arterial embolization and myomectomy to treat uterine myoma LI Guang-tai, WEN Ting-ru Genetic aberrations and human papillomavirus status in vulvar squamous cell carcinomas OUYANG Ling, ZHANG Shu-lan, WANG Xin Contraceptive efficacy of bioadhesive benzalkonium chloride gel comparison with nonoxynol-9 gel XU Jin-xun, HUANG Zi-rong, WU Yu, et al