This study reveals that small-quantity lipid-based nutrient supplements (SQ-LNS) significantly improve birth outcomes. Compared to standard iron and folic acid or multiple micronutrient supplements, SQ-LNS increased birth weight by an average of 49 grams and improved all birth anthropometric z-scores. The supplements also reduced the risk of low birth weight by 11%, newborn stunting by 17%, newborn wasting by 11%, and small head size by 15%. These findings underscore the potential of SQ-LNS to address multiple nutritional deficiencies during pregnancy, thereby enhancing maternal and infant health outcomes in low- and middle-income countries