Cheng-En Hsieh1, Robert Kuo-Kuang Lee2, Fang-Ju Sun3, Ryh-Sheng Li4, Shyr-Yeu Lin5, Ming-Huei Lin6, Yuh-Ming Hwu7. 1. Department of Obstetrics and Gynecology, Division of Infertility and Reproductive Endocrinology, MacKay Memorial Hospital, Taipei, Taiwan. Electronic address: shitxn@gmail.com. 2. Department of Obstetrics and Gynecology, Division of Infertility and Reproductive Endocrinology, MacKay Memorial Hospital, Taipei, Taiwan; Department of Obstetrics and Gynecology, Taipei Medical University, Taiwan; Department of Medical Research, MacKay Memorial Hospital, Taiwan. Electronic address: shitxn@gmail.com. 3. Department of Medical Research, MacKay Memorial Hospital, Taiwan; MacKay Junior College of Medicine, Nursing, and Management, Taipei, Taiwan. Electronic address: fjsun.b612@mmh.org.tw. 4. Department of Obstetrics and Gynecology, Division of Infertility and Reproductive Endocrinology, MacKay Memorial Hospital, Taipei, Taiwan. Electronic address: emersonli@gmail.com. 5. Department of Obstetrics and Gynecology, Division of Infertility and Reproductive Endocrinology, MacKay Memorial Hospital, Taipei, Taiwan. Electronic address: shyryeu.lin@gmail.com. 6. Department of Obstetrics and Gynecology, Division of Infertility and Reproductive Endocrinology, MacKay Memorial Hospital, Taipei, Taiwan; MacKay Junior College of Medicine, Nursing, and Management, Taipei, Taiwan; MacKay Medical College, New Taipei City, Taiwan. Electronic address: huei97@yahoo.com.tw. 7. Department of Obstetrics and Gynecology, Division of Infertility and Reproductive Endocrinology, MacKay Memorial Hospital, Taipei, Taiwan; MacKay Junior College of Medicine, Nursing, and Management, Taipei, Taiwan; MacKay Medical College, New Taipei City, Taiwan. Electronic address: hwu4416@yahoo.com.tw.
Abstract
OBJECTIVE: The aim of this study was to assess whether the early blastulation (EB) of day 4 embryo is a useful predictor for outcomes in fresh elective single embryo transfer (eSET) cycles. MATERIALS AND METHODS: We retrospectively enrolled patients undergoing fresh SET cycles in our hospital from April 2014 to September 2016 and met with the following criteria: 1) age <38 years, 2) first IVF/ICSI cycle, 3) at least two blastocysts with morphological grading better than or equal to 4BB. RESULTS: A total of 81 patients were included. Of whom, 55 patients (68%) had undergone eSET with embryos that had early blastulation on day 4 while the other 26 patients had had no EB. Early blastulation has shown a higher rate of good blastocyst (84.3% vs. 60.5%, p < 0.0001). The clinical pregnancy rate of EB group was significantly higher than that of non-EB group (56.4% vs. 27.0%, p = 0.013). There is also a tendency in EB group to have a lower abortion rate (3.23% vs. 28.6%, p = 0.081). CONCLUSIONS: EB on day 4 is a useful predictor of the quality of the following embryos (i.e. day 5 embryo). It is a simple tool in selecting the best embryo to get a higher pregnancy rate in fresh eSET cycles. TRIAL REGISTRATION: This study was supplementally registered by the MacKay Memorial Hospital Institutional Review Board on April 18, 2017 (registration No. 17MMHIS039e).
OBJECTIVE: The aim of this study was to assess whether the early blastulation (EB) of day 4 embryo is a useful predictor for outcomes in fresh elective single embryo transfer (eSET) cycles. MATERIALS AND METHODS: We retrospectively enrolled patients undergoing fresh SET cycles in our hospital from April 2014 to September 2016 and met with the following criteria: 1) age <38 years, 2) first IVF/ICSI cycle, 3) at least two blastocysts with morphological grading better than or equal to 4BB. RESULTS: A total of 81 patients were included. Of whom, 55 patients (68%) had undergone eSET with embryos that had early blastulation on day 4 while the other 26 patients had had no EB. Early blastulation has shown a higher rate of good blastocyst (84.3% vs. 60.5%, p < 0.0001). The clinical pregnancy rate of EB group was significantly higher than that of non-EB group (56.4% vs. 27.0%, p = 0.013). There is also a tendency in EB group to have a lower abortion rate (3.23% vs. 28.6%, p = 0.081). CONCLUSIONS:EB on day 4 is a useful predictor of the quality of the following embryos (i.e. day 5 embryo). It is a simple tool in selecting the best embryo to get a higher pregnancy rate in fresh eSET cycles. TRIAL REGISTRATION: This study was supplementally registered by the MacKay Memorial Hospital Institutional Review Board on April 18, 2017 (registration No. 17MMHIS039e).