Effect of the duration of estrogen administration prior to frozen embryo transfer on live birth rate and pregnancy outcomes in programmed cycles Authors Zhiyi Song (ORCID: https://orcid.org/0000-0001-9429-8618) Junhao Yan (ORCID: https://orcid.org/0000-0002-7110-8698) Jiahui Wang (ORCID: https://orcid.org/0000-0002-9490-3950) Qian Zhang (ORCID: https://orcid.org/0000-0001-9846-0248) Wei Zhou (ORCID: https://orcid.org/0000-0002-5081-4710) Zhe Li (ORCID: https://orcid.org/0000-0002-9653-006X) Jincheng Li (ORCID: https://orcid.org/0000-0002-8363-3916) Tianxiang Ni (ORCID: https://orcid.org/0000-0001-6184-2832) Institutions Chinese Academy of Medical Sciences & Peking Union Medical College (CN) Peking Union Medical College Hospital (CN) Institut de Médecine de la Reproduction (FR) Qilu Hospital of Shandong University (CN) Explore the Global Research Space Interactive Map