Objective To explore the effects of prenatal vibration stress in different gestational time points on the spatial learning and memory in rats. Methods The Sprague-Dawley(SD)pregnant rats were vibrated strong and weak alternately in 1~7d,8~14d,15~21dof gestation period,and the offspring was tested in Barnes maze to identify their spatial learning and memory,the difference of each group then compared. Results Learning process:1)The journey of exploration:It was higher than control group during early pregnancy...