The test of cliff avoidance reflex, surface righting reflex, air righting reflex, auditory startle reflex, visual placing reflex and forelimb hanging were studied in offspring of Wistar rats. 孕鼠自然分娩,对仔鼠早期神经行为发育指标:前肢悬挂、断崖回避反射、平面翻正、空中翻正反射、听觉惊愕、视觉定位进行测试;