Pregnancy and breastfeeding lower a mother’s nutrient stores, potentially affecting her nutritional status upon conceiving another child. This article evaluates the benefits of nutrition interventions during previous pregnancy and the postpartum period as a way to improve the growth of a subsequent child, specifically through supplementing lipid-based nutrient supplements (LNS), multiple micronutrients (MMN), and iron plus folic acid (IFA). It concludes that LNS and MMN supplementation during pregnancy did not improve the growth of a subsequent child beyond the effects of IFA alone, while also noting that more research is needed regarding preconception supplementation.