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- W3147296980 abstract "Objective To evaluate the vaiue of using a combined grading for embryo growth rate and morphology and zygote pronuclear morphology,and to select embryos for transfer in clinical in-vitro fertilization ( IVF)/ intra-cytoplasmic sperm injection (ICSI). Methods In this retrospective study, a total of 2714 normal zygotes(2 pronuclei) from 434 treatment cycles with IVF/ICSI was analyzed between May 2003 and December 2003. These zygotes were divided into two groups (synchronous group and nonsynchronous group) according to the developmental synchrony of pronuclei. The developmental potential of zygotes from these two groups was observed. Embryos for transfer were selected initially by embryo growth rate and morphology, secondarily by zygote grade. The clinical pregnancy rates and implantation rates were compared according to whether the embryos from synchronous group were transferred. Results There were 2714 normal zygotes, the good-quality embryos(≥6 cells,grade Ⅰ-Ⅱ) rate of the synchronous group (41.88%,743/1774) was significantly higher (P0.001) than the nonsynchronous group (33.94%, 319/940). Totally 395 cycles transferred at least one embryo from synchronous group, the clinical pregnancy rate was 47.85%(189/395) and implantation rate was 27.49%(273/993).There was no significant difference from 39 cycles which did not transfer embryos from nonsynchronous group. The clinical pregnancy rate was 43.59%(17/39) and implantation rate was 25.00%(21/84). Conclusion The data indicate that there are no significant differences in pregnancy rates and implantation rates between different zygote grade when selecting embryos for transfer by combined grading." @default.
- W3147296980 created "2021-04-13" @default.
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- W3147296980 date "2006-01-01" @default.
- W3147296980 modified "2023-09-23" @default.
- W3147296980 title "Research on the selection of embryos for transfer using a combined grading for embryo growth rate and morphology and zygote pronuclear morphology" @default.
- W3147296980 hasPublicationYear "2006" @default.
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