Despite the variety of modern molecular techniques available, examination of foetal
anatomy is still a fundamental part of teratological studies in evaluating the
developmental toxicity of xenobiotics or other non-chemical factors. The article
presents contemporary methods of embryotoxicity and foetotoxicity assessment.
A single alizarin red S and double alcian blue followed by alizarin red S staining, as
well as various methods of soft tissue examination are discussed
