Objective:To explor the role of CD86 costimulation on the modulation of Th1/Th2 cytokines expression at maternal fetal interface Methods:The abortion prone CBA×DBA/2 matings were established as the models of spontaneous abortion and the nonabortion prone CBA×Balb/c matings were used as the models of normal pregnancy The pregnant CBA females were injected intraperitioneally by rat IgG at day 4,6,8,10 of gestation as control In another two groups, the pregnant CBA females were injected with rat anti ...