The baby girl did not survive either. Voltaire wrote to Mme Denis, who was his niece and had been his lover for some years prior to du Châtelet's death (see for example):
Ang sanggol na babae ay hindi alinman sa matirang buhay. Voltaire wrote sa Mme Denis, na kanyang pamangking babae at nagkaroon na ng kanyang lover para sa mga ilang taon bago du Châtelet ng kamatayan (tingnan ang halimbawa):