A woman driving a motor vehicle when she knows (or ought reasonably to know) herself to be pregnant is to be regarded as being under the same duty to take care for the safety of her unborn child as the law imposes on her with respect to the safety of other people; and if in consequence of her breach of that duty her child is born with disabilities which would not otherwise have been present, those disabilities are to be regarded as damage resulting from her wrongful act and actionable accordingly at the suit of the child.