Objective: To explore the role of matrix metalloproteinase 9 (MMP 9) and tissue inhibitor of metalloproteinase 1 (TIMP 1) protein on embryo implantation in unexplained infertile women.

• 目的 :探讨不明原因不孕妇女子宫内膜种植窗期基质金属蛋白酶 - 9(MMP- 9)及金属蛋白酶组织抑制物- 1(TIMP- 1)的表达对胚胎着床的影响。