单精子冷冻和常规冷冻对显微取精患者的胚胎培养及妊娠影响的比较

【目的】比较单精子冷冻和常规冷冻对显微取精患者的胚胎培养及妊娠影响。【方法】回顾性分析自2018年1月至2021年12月于中山大学附属第六医院生殖医学研究中心行显微镜取精术患者的临床资料,行单精子冷冻共39例307枚成熟卵子为单精子冷冻组,通过SPSS统计软件倾向性评分匹配女方基本助孕信息1:1匹配选择对照组,为常规冷冻组,共410枚成熟卵子,分析单精子冷冻与常规冷冻两组的受精、胚胎培养及移植后妊娠情况。【结果】单精子冷冻组和常规冷冻组的年龄、体质量指数(BMI)、不孕年限、基础基础卵泡刺激素(FSH)、基础黄体生成素(LH)、基础雌二醇(E2)、抗苗勒管激素(AMH)、窦卵泡计数(AFC)、获卵数、移植胚胎数等一般资料的比较,差异均差异无统计学意义(P>0.05);两组的受精率、可利用胚胎率、优质胚胎率比较分别为65.8%vs. 60.49%、67.82%vs. 58.87%、70.80%vs. 75.34%,差异均无统计学意义;两组的临床妊娠率为45.45%vs. 70.0%,有统计学差异(P=0.049)。【结论】显微取精患者若获取精子极少,为增加每颗精子利用机会以及保证后续助孕精子解冻后获取精子,单精子冷冻可为有效选择,但临床妊娠率下降,因例数限制,对后续妊娠的影响还需增加例数再观察分析。

单精子冷冻研究进展

精子冷冻技术在辅助生殖支柱(ART)中已得到广泛应用,但常规冷冻方法不适用于冷冻微量精子,单精子冷冻技术的应用将在很大程度上改善隐匿性精子症、非梗阻性无精症患者的临床治疗。从1997年Cohen等最先提出单精子冷冻概念至今,研究者们不断地尝试探索单精子冷冻载体,本文依据载体的分类,对单精子冷冻方法及临床结局做一简要阐述。

UItrastructural Observation on Rat Spermatozoa Treatedwith Tripchlorolide(T_4) from Tripterygium wilfordii

Adult male rats were treated orally with monomer T_4(Tripchlorolide) isolated from Tripterygium wilfordii, at the dose of 50μg/kg/day,6 days/week for6 weeks.Ultrathin section and freeze etching replica of seminiferous tubules and epididymal spermatozoa were examined with elec-tron microscope. The results showed that the spemiogenesis was inhibited T_4 in seminiferous tu-bules. However,the damage and disruption of the spermatozoa were more serious in the epididymis.Damage of the structure and function ot microtubule and microfilament may be the chief reason for sperm damage. Sperm membrane was also very sensitive to the treatiment of monomer T_4.