Civil Code (Cap. 16), article 600

600. (1) Those who, at the time of the testator’s death or of the fulfilment of a suspensive condition on which the disposition depended, were not yet conceived are incapable of receiving by will. (2) The provisions of this article shall not apply to the immediate children of a determinate person who is alive at the time of the death of the testator, nor to persons who may be called to the enjoyment of a foundation. Those not born viable cannot receive by will.