The factor of uterine tube occupied 30.16%, it was a capital factor.

其中，输卵管因素占30.16%，是不孕的第一原因；

AIM: the distribution of endothelin-1 (ET-1) in uterine tube and its source were investigated in order to find out relation between endothelin-1 and function of uterine tube.

目的：为了探明内皮素(et)在输卵管组织中的分布及来源，以便进一步探讨内皮素- 1 (et - 1)与输卵管功能调节之间的关系。