Maternal nutrition plays a crucial role during pregnancy, influencing both the mother's well-being and the baby's development. French biochemist Jessie Inchauspé highlights three key nutrients that expecting mothers should prioritize: choline, protein, and omega-3 fatty acids. Choline, recommended at 450 mg daily, is vital for brain development, and can be sourced from eggs, meat, and soybeans. Protein needs increase significantly, with a suggestion of 1.5 g per kilogram of pre-pregnancy weight during the second and third trimesters to support organ development. Omega-3 fatty acids, particularly DHA found in fatty fish, are essential for brain health and may help prevent premature births. Inchauspé also warns against excessive sugar intake, advising mothers to limit added sugars to below 25 grams to mitigate potential metabolic risks for the baby. By focusing on these nutrients, mothers can enhance their health and improve pregnancy outcomes.