1Translational Medicine Research on Reproduction Safety-Challenges & ProspectivesWANG Yi-fei225-2282The International Attention on the Long-acting Reversible ContraceptivesWU Shang-chun, CHU Guang-hua229-2323Current Status of Long-acting Reversible ContraceptivesLIU Ju-hong, LI Jian233-2354Management of Irregular Vaginal Bleeding Induced by the Progestin only ContraceptivesJIN Li236-239,2495The Feasibility of Long-acting Reversible Contraception for Nulliparous PersonLIU Xiao-ai240-2436Application of the Levonorgestrel-releasing Intrauterine System and the Transcervical Endometrium Resection in Treating Menorrhagia：A Clinical Control StudyWANG Yu, BI Fang-fang, YANG Qing, ZHANG Shu-lan244-2467Clinical Application and Evaluation of Levonorgestrel-releasing Intrauterine SystemTIAN Ying, LANG Yu-ping, WEI Zhen-he, DONG Yan, YANG Hua247-2498The Clinical Performance of Single Rod Etonogestrel ImplantLI Jin-jin, LIU Xin-yan250-2539Application and Progress of Estrogen Oral ContraceptivesWANG Xiao, XIONG Cheng-liang254-25710Research Progress on Antifertility of Chinese Herbal MedicineHUANG Shi-xing, XIONG Cheng-liang258-26011Research Progress of the Antimicrobial Peptides with Dualfunctionality of Spermicide and MicrobicideZHANG Wei, HOU Li, YU He-ming261-263,26612Immediate Post-abortal Insertion of the Intrauterine DevicesWANG Cai-yan, HUANG Zi-rong264-26613The Technical Guide of Long-acting Reversible Contraceptives for those Post-abortion and Postpartum WomenHOU Zi-hong, WU Shang-chun, GU Xiang-ying267-268,28914The Correlation between IVF Methods and Monozygotic Twins GestationFAN Wen-qian, SUN Ying-pu, SU Ying-chun, GUO Yi-hong275-277,30815Application of Cordocentesis Guided by Transabdominal Ultrasound in Prenatal DiagnosisLI Xiao-feng, GONG Fei, XIAO Hong-mei, TAN Yue-qiu, LIN Ge278-28016Exposure of Phthalic Acid Esters and Spontaneous AbortionGAO Fu-mei, CAI Xiao-hui, SHEN Huan281-28317Clinical Application of the Laparoscopy Combined with Hysteroscopy or Laparoscopy only in Treating Cornual Pregnancy and Interstitial Tubal PregnancyWU Ji-rong, PENG Xiao-mei, LI Jia-qi284-28518Short-term Efficacy and Quality of Life Evaluation for Adenomyosis after High Intensity Focused Ultrasound TreatmentLU Bai-yu, HU Kui, YAN Li-mei, HE Min, HUANG Guo-hua, LI Ke-quan, HE Jia286-28919Efficacy of Letrozole in Clomiphene-resistant Infertile Women with Polycystic Ovarian SyndromeYANG Zheng-li, LIU Rong-xia, HAO Guo-rong290-29220Status of Reproductive Health Knowledge among Undergraduates and its Influential FactorsLI Guo-ju, LI Xiao-mei, LIU Song, HOU Yun-rong, LI Xiang-yun293-296 