Department of Obstetrics and Gynecology the Third Affiliated Hospital of Inner Mongolia Medical University Baotou Inner Mongolia China;
Department of Neurosurgery the First Affiliated Hospital of Baotou Medical College Baotou Inner Mongolia China;
Department of Obstetrics and Gynecology Baogang Hospital Baotou Inner Mongolia China;
Pregnant rats; Intrauterine infection; Inflammation; Endometrium; Blood vessel formation;