NGF and adenomyosis: The implantation rate in the adenomyosis group significantly decreased compared with that in the control group (2.31% vs. 26.15%, Chi-square = 30.28, P < 0.001); besides, the embryo implantation rate of mice with adenomyosis markedly increased in the anti-NGF group compared with that in the adenomyosis group (9.23% vs. 2.31%, Chi-square = 5.73, P < 0.05).