This work was supported by WHO/Rockefeller Foundation Network Project, The "973" and CAS "Knowledge Innovation" Programs and National Natural Science Foundation of China (Grant No. 39976284).
In order to investigate the relationship between the endometrial receptivity and matrix metalloproteinase-2 (MMP-2) and tissue inhibitor of metalloproteinase-1,-3 (TIMP-1,-3) in the endometrium, we used early pregnant...