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.
Henna is a natural dye, it is a permanent dye. However like all red dyes, chemical and natural both tend to fade quickly. You will have to let it grow it to get back to your original color. If you have used 100% pure henna, not a compound henna product with other stuff added, you can use commercial chemical hair dyes over it is you wish.