Chapter 14: Nutrition for Childbearing

The chapter establishes gestational weight gain targets calibrated to prepregnancy body mass index categories, with underweight women needing greater total gain than those classified as normal weight, overweight, or obese, and explains how inadequate or excessive weight gain increases risks for complications including intrauterine growth restriction, preterm labor, and fetal macrosomia. Energy needs remain stable during early pregnancy but increase substantially in the second and third trimesters to support expanded blood volume, placental growth, and fetal tissue accumulation. Protein requirements rise to facilitate maternal and fetal protein synthesis, while micronutrient demands intensify significantly; folic acid supplementation prevents neural tube malformations, iron supplementation addresses the physiological anemia of pregnancy and builds fetal iron stores, and calcium intake ensures proper fetal skeletal mineralization without depleting maternal bone density. The chapter addresses practical food safety concerns by identifying high-risk foods including predatory fish species with bioaccumulated mercury, undercooked animal products, and unpasteurized dairy and soft cheeses that may harbor pathogens causing listeriosis or toxoplasmosis. Cultural dietary patterns and food beliefs are explored, including traditional classification systems that assign thermal properties to foods and influence food selection during pregnancy across diverse populations. The chapter identifies vulnerable populations requiring enhanced nutritional assessment and intervention, such as adolescent pregnant women, individuals experiencing food insecurity, and those with histories of disordered eating. Specific guidance addresses modified dietary patterns for vegetarian and vegan pregnancies, management of lactose intolerance, and common gestational phenomena including hyperemesis, cravings, and pica. The postpartum section distinguishes lactating mothers' elevated caloric and nutrient requirements for milk synthesis from the prepregnancy nutritional baseline that non-breastfeeding women resume.