Objective To assess whether the detection of the meiotic spindle could anticipate the appearance of early cleavage. Methods Oocytes were obtained from stimulated ovaries of consenting patients undergoing oocytes retri...Objective To assess whether the detection of the meiotic spindle could anticipate the appearance of early cleavage. Methods Oocytes were obtained from stimulated ovaries of consenting patients undergoing oocytes retrieval for ICSI. Spindles were imaged with the Polscope. After ICSI, oocytes with or without spindles were cultured for examination of early cleavage and embryo development. A total of 328 oocytes from 50 cycles were examined with the Polscope and inseminated by ICSI. Results Spindles were imaged in 81.7% of oocytes. After ICSI, more oocytes with spindles （78.4%） fertilized normally than oocytes without spindles （53.3%） （P〈0. 001）. At 25-27 h post ICSI, more fertilized oocytes developed from oocytes with spindles （81.9%） were detected early cleavage than those from oocytes without spindles （28.1%） （P〈0.001）. Significantly more embryos with early cleavage （82.2%） developed to high quality embryos at d 3 compared with the embryos without early cleavage （48.3%） （P=0.001）. The value of rs related to the relationship between spindles and early cleavage was 0.420 （P〈0.001）. Conclusion The existing of the early cleavage may have a predictive value on the opportunity of high quality embryos and the existing of the spindle may have a predictive value in the appearance of early cleavage.展开更多
Objective:To compare the pregnancy rate between day 3 and day 5 transfer regardless grades of embryos and number of transferred embryo.Methods: Retrospective cohort, a total of seven hundred and four patients met our ...Objective:To compare the pregnancy rate between day 3 and day 5 transfer regardless grades of embryos and number of transferred embryo.Methods: Retrospective cohort, a total of seven hundred and four patients met our inclusion criteria, with 411 had day 3 embryo transfer and 293 had day 5 embryo transfer. The patients who were older than 40 years old were excluded. Embryo transfer was carried out in all patients in both transfer groups.Results:Both clinical pregnancy rate and implantation rate did not show any statistically significant difference between the day 3 and day five transfer groups. These were 44%vs. 45% withP=0.82 and 19%vs. 19% withP=0.99 respectively. An increase of miscarriage rate with day 5 embryo transferred compare with day 3 (12.0%vs. 4.4%,P=0.01), but no significant difference was found about biochemical pregnancy rate (P=0.52).Conclusions:Transferring embryo at day 5 may not provide any additional benefit over day 3 transfers to patients. In addition, it increases the risk of miscarriage. Further studies of this issue needed for confirming our findings.展开更多
目的探讨早期卵裂对体外受精胚胎移植(IVF-ET)临床结局的影响。方法回顾性分析2005年1月至2008年12月在我院接受IVF-ET治疗的356个移植周期2,967枚卵裂胚资料。结果将2,967枚卵裂胚分为早期卵裂胚组和非早期卵裂胚组,早期卵裂组优胚率...目的探讨早期卵裂对体外受精胚胎移植(IVF-ET)临床结局的影响。方法回顾性分析2005年1月至2008年12月在我院接受IVF-ET治疗的356个移植周期2,967枚卵裂胚资料。结果将2,967枚卵裂胚分为早期卵裂胚组和非早期卵裂胚组,早期卵裂组优胚率显著高于非早期卵裂胚组(87.4% vs. 62.9%,P<0.01);将356个移植周期分为全部移植早期卵裂胚(A组)、部分移植早期卵裂胚(B组)和无早期卵裂胚移植(C组)三组,A、B组的临床妊娠率(53.3% vs.53.6%)、种植率(36.6% vs. 32.1%)均显著高于C组(25.4% vs. 14.9%,P<0.05),且A组的多胎率显著高于C组(42.5%vs. 19.4%,P<0.05)。结论早期卵裂胚可作为预测胚胎发育潜能的一个有效指标,选择性移植早期卵裂胚有助于提高IVF-ET的临床妊娠率。展开更多
文摘Objective To assess whether the detection of the meiotic spindle could anticipate the appearance of early cleavage. Methods Oocytes were obtained from stimulated ovaries of consenting patients undergoing oocytes retrieval for ICSI. Spindles were imaged with the Polscope. After ICSI, oocytes with or without spindles were cultured for examination of early cleavage and embryo development. A total of 328 oocytes from 50 cycles were examined with the Polscope and inseminated by ICSI. Results Spindles were imaged in 81.7% of oocytes. After ICSI, more oocytes with spindles （78.4%） fertilized normally than oocytes without spindles （53.3%） （P〈0. 001）. At 25-27 h post ICSI, more fertilized oocytes developed from oocytes with spindles （81.9%） were detected early cleavage than those from oocytes without spindles （28.1%） （P〈0.001）. Significantly more embryos with early cleavage （82.2%） developed to high quality embryos at d 3 compared with the embryos without early cleavage （48.3%） （P=0.001）. The value of rs related to the relationship between spindles and early cleavage was 0.420 （P〈0.001）. Conclusion The existing of the early cleavage may have a predictive value on the opportunity of high quality embryos and the existing of the spindle may have a predictive value in the appearance of early cleavage.
文摘Objective:To compare the pregnancy rate between day 3 and day 5 transfer regardless grades of embryos and number of transferred embryo.Methods: Retrospective cohort, a total of seven hundred and four patients met our inclusion criteria, with 411 had day 3 embryo transfer and 293 had day 5 embryo transfer. The patients who were older than 40 years old were excluded. Embryo transfer was carried out in all patients in both transfer groups.Results:Both clinical pregnancy rate and implantation rate did not show any statistically significant difference between the day 3 and day five transfer groups. These were 44%vs. 45% withP=0.82 and 19%vs. 19% withP=0.99 respectively. An increase of miscarriage rate with day 5 embryo transferred compare with day 3 (12.0%vs. 4.4%,P=0.01), but no significant difference was found about biochemical pregnancy rate (P=0.52).Conclusions:Transferring embryo at day 5 may not provide any additional benefit over day 3 transfers to patients. In addition, it increases the risk of miscarriage. Further studies of this issue needed for confirming our findings.
文摘目的探讨早期卵裂对体外受精胚胎移植(IVF-ET)临床结局的影响。方法回顾性分析2005年1月至2008年12月在我院接受IVF-ET治疗的356个移植周期2,967枚卵裂胚资料。结果将2,967枚卵裂胚分为早期卵裂胚组和非早期卵裂胚组,早期卵裂组优胚率显著高于非早期卵裂胚组(87.4% vs. 62.9%,P<0.01);将356个移植周期分为全部移植早期卵裂胚(A组)、部分移植早期卵裂胚(B组)和无早期卵裂胚移植(C组)三组,A、B组的临床妊娠率(53.3% vs.53.6%)、种植率(36.6% vs. 32.1%)均显著高于C组(25.4% vs. 14.9%,P<0.05),且A组的多胎率显著高于C组(42.5%vs. 19.4%,P<0.05)。结论早期卵裂胚可作为预测胚胎发育潜能的一个有效指标,选择性移植早期卵裂胚有助于提高IVF-ET的临床妊娠率。
