1. The development of common law under section 39(2) of the Constitution requires that all law, including the law of delict, must be infused with constitutional values and promote the spirit, purport and objects of the Bill of Rights. 2. Section 28(2) of the Constitution, which provides that a child's best interests are of paramount importance in every matter concerning the child, must be considered in determining whether to recognize a child's claim for damages arising from negligent pre-natal misdiagnosis. 3. The wrongfulness enquiry in delict is explicitly normative and must be conducted within the constitutional framework, considering whether policy and legal convictions of the community, constitutionally understood, regard the harm-causing conduct as acceptable. 4. Where the factual situation is complex and the legal position uncertain, particularly involving development of the common law to recognize new rights, it is generally inappropriate to decide the matter on exception rather than after hearing all evidence. 5. A child's claim for patrimonial damages is potentially viable where: (a) a pre-natal misdiagnosis of a medical condition or congenital disability deprived the mother of informed choice to terminate the pregnancy, and (b) the parents do not exercise their own claim for those patrimonial damages. 6. The 'harm' in such cases can be understood as the financial burden imposed on the child where parents fail to claim, not the disability itself, and the medical expert's liability would not exceed what would have been owed to the parents. 7. This recognition does not open floodgates for claims by children against parents, as the claim is against the negligent medical practitioner and is predicated on proof that the mother would have chosen abortion if properly informed.