结果维甲酸致畸组共获得胎鼠99只,48.3%(48/99)孕鼠胚胎肉眼观察出现腰骶部显性脊柱裂。

• Results 99 fetuses were obtained from the treated rats in the experimental group. Among the 99 fetuses, 48.3%25 (48/99)had major spina bifida and myelodysplasia.