Our research used this laser system and its precise measurement software to make a all - round study on the relationship of zona pellucida thickness / hardness variation of human embryos and clinical pregnancy outcome following in vitro fertilization treatment and the application of laser thinning in assisted hatching . the purpose of this study was to try to provide the basic rationale for assisted hatching and an alternative assisted hatching method 本研究即為應(yīng)用這種激光系統(tǒng)及其精確的測量軟件,對zpt 、 zptv與妊娠結(jié)局的關(guān)系、體外培養(yǎng)胚胎透明帶硬度的變化及激光薄化透明帶進(jìn)行輔助孵出的臨床應(yīng)用進(jìn)行綜合研究探討,旨在為輔助孵出的病人選擇、方法選擇提供基礎(chǔ)與臨床理論依據(jù)。