This paper examines the affordability of a basic nutritious diet for low-income families in Nova Scotia over three developmental periods (pregnancy, perinatal, early infancy) using economic simulations that include food costing and secondary data. The cost of a nutritious food basket was determined from a random sample of grocery stores in Nova Scotia (n= 21), along with the cost of infant formula (n= 29) and prenatal vitamins and vitamin D drops (n= 15), from randomly selected pharmacies. The monthly funds remaining to purchase a basic nutritious diet were calculated for several household scenarios, after deducting essential living expenses from net incomes. Each scenario included either a pregnant woman or a breastfed or formula-fed infant at 3months, and either Income Assistance, Federal Maternity Benefits based on minimum wage employment, or a $15/h wage. Income Assistance and Federal Maternity Benefits, based on minimum wage, were inadequate to purchase a basic nutritious diet during pregnancy or in early infancy whether breastfeeding or formula feeding. All household scenarios faced significant potential monthly deficits if they were to purchase a basic nutritious diet. Minimum wage and income security programs are inadequate for the purchase of a basic nutritious diet throughout the prenatal, perinatal, and early infancy periods in Nova Scotia, emphasizing risk of food insecurity as a critical issue for young families facing income constraints. Adequate maternity protection is required to support access to food and nutrition essential for maternal and infant health.