Histological transverse sections of Control (A), Vehicle control (B) of different dose groups (44,22,11µg/g B.W) (C-H), 18 days old fetus from brain, Ex: exencephaly, M Vent: misshapen ventricle, HB: hind brain, MB, mandibular gland; FP, fused pinna, M sub corticle region: misshapen sub corticle region; Co, cortex; RA, right atrium; LA, left atrium; RA, right atrium; M Sc, misshapen spinal cord; SB, spina bifida; Om, Omphalocoel; NC, nasal cavity; Sg, serous gland; IRS, intra retinal space; RLV, right lateral ventricle, MB, mandibular gland; CA, cerebral aquaduct; LLV, left lateral ventricle; HC, hyaloid cavity; NS, nasal septum; FV, follicles of vibrissae; L, lens; FB, primordium of 1frontal bone; NLR, neural layer of retina; PM, pre molar.