A child may be able to say a word or phrase well in a relaxed setting but, when he is put on display and asked to  Tell Grandma..., the plan for saying that word or phrase is not accessible, and the child fails. Children with DAS may also lose words.
When applied to the surface of the skin or as a hair dye, henna is generally safe for use during pregnancy. Select your dye carefully, and make sure that the dye you are using is 100% natural henna. Natural henna stains the skin orange, red, brown, cinnamon, brick, chocolate, or coffee, and can last about one to four weeks.
Reasons for not using hair dye during pregnancy. It has been calculated that more than 60 percentages out of all the things that we use on our skin is absorbed. Similar is the case with hair dyes which on coming in contact with the hair scalp enters the blood stream of the woman and comes in contact with the child.