Methods A retrospective study of 94 infertile women who had undergone the assisted reproductive technology(ART) treatments with different outcomes(pregnant or non-pregnant).

• 方法 对 94例辅助生殖技术治疗结果不同 (妊娠或未孕 )的不孕妇女内膜下螺旋动脉的血流进行回顾性比较分析。