Risk Factors and Early Predictors for Heterotopic Pregnancy after In Vitro Fertilization

• Meiju Liu ,

  Contributed equally to this work with: Meiju Liu, Xiuqing Zhang

  Affiliations Center for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan 250001, China, National Research Center for Assisted Reproductive Technology and Reproductive Genetic, Jinan, China, The Key laboratory for Reproductive Endocrinology of Ministry of Education, Jinan, China, Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan 250021, China, Department of Reproductive Medicine, Linyi People’s Hospital, Linyi 276000, China

  ⨯
• Xiuqing Zhang ,

  Contributed equally to this work with: Meiju Liu, Xiuqing Zhang

  Affiliations Center for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan 250001, China, National Research Center for Assisted Reproductive Technology and Reproductive Genetic, Jinan, China, The Key laboratory for Reproductive Endocrinology of Ministry of Education, Jinan, China, Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan 250021, China

  ⨯
• Ling Geng ,

  * E-mail: gengling78@126.com (LG); hanzh80@yahoo.com (HZ)

  Affiliations Center for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan 250001, China, National Research Center for Assisted Reproductive Technology and Reproductive Genetic, Jinan, China, The Key laboratory for Reproductive Endocrinology of Ministry of Education, Jinan, China, Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan 250021, China

  ⨯
• Mingdi Xia,

  Affiliations Center for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan 250001, China, National Research Center for Assisted Reproductive Technology and Reproductive Genetic, Jinan, China, The Key laboratory for Reproductive Endocrinology of Ministry of Education, Jinan, China, Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan 250021, China

  ⨯
• Junyu Zhai,

  Affiliations Center for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan 250001, China, Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai 200135, China

  ⨯
• Wei Zhang,

  Affiliation Department of joint and bone oncology, Provincial Hospital Affiliated to Shandong University, Jinan 250001, China

  ⨯
• Yuchao Zhang,

  Affiliations Center for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan 250001, China, National Research Center for Assisted Reproductive Technology and Reproductive Genetic, Jinan, China, The Key laboratory for Reproductive Endocrinology of Ministry of Education, Jinan, China, Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan 250021, China

  ⨯
• Yinhua Sun,

  Affiliations Center for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan 250001, China, National Research Center for Assisted Reproductive Technology and Reproductive Genetic, Jinan, China, The Key laboratory for Reproductive Endocrinology of Ministry of Education, Jinan, China, Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan 250021, China

  ⨯
• Jiangtao Zhang,

  Affiliations Center for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan 250001, China, National Research Center for Assisted Reproductive Technology and Reproductive Genetic, Jinan, China, The Key laboratory for Reproductive Endocrinology of Ministry of Education, Jinan, China, Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan 250021, China

  ⨯
• Dongyi Zhu,

  Affiliation Department of Reproductive Medicine, Linyi People’s Hospital, Linyi 276000, China

  ⨯
• Han Zhao ,

  * E-mail: gengling78@126.com (LG); hanzh80@yahoo.com (HZ)

  Affiliations Center for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan 250001, China, National Research Center for Assisted Reproductive Technology and Reproductive Genetic, Jinan, China, The Key laboratory for Reproductive Endocrinology of Ministry of Education, Jinan, China, Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan 250021, China

  ⨯
• Zi-Jiang Chen

  Affiliations Center for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan 250001, China, National Research Center for Assisted Reproductive Technology and Reproductive Genetic, Jinan, China, The Key laboratory for Reproductive Endocrinology of Ministry of Education, Jinan, China, Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan 250021, China, Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai 200135, China

  ⨯