Pregnancy

MODULE 13: Nutrition for Pregnancy, Breastfeeding, and Infant Feeding

LEARNING OBJECTIVES

  • Nutrient Needs during Pregnancy
    • Identify nutrient needs and recommendations for:
    • Energy
    • Protein
    • Carbohydrates
    • Fat
    • Folate
    • Vitamin B12
    • Iron
    • Calcium
    • Zinc
    • Fluid
  • Supplementation
    • Discuss who benefits most from supplementation during pregnancy.
  • Complications of Pregnancy
    • Describe gestational diabetes, edema, pre-eclampsia, and eclampsia.
  • Gastrointestinal Complications
    • List complications and reasons during pregnancy associated with gastrointestinal issues.
  • Negative Impacts
    • Identify the negative effects of caffeine, alcohol, and smoking during pregnancy.
  • Food-Borne Illnesses
    • Identify food-borne illnesses of greatest concern during pregnancy.
  • Breastfeeding Benefits
    • List benefits for both the mother and infant.
  • Breast Milk Composition
    • Compare colostrum vs. mature breast milk composition.
  • Infant Feeding Recommendations
    • Identify recommendations for early foods for infants.

STAGES OF PREGNANCY

  • Duration of Pregnancy
    • Full-term pregnancy lasts for 38-42 weeks, divided into three stages of about 13 weeks each.
  • Developmental Phases
    • Each stage is associated with different phases of fetal development and health implications for the mother.

CRITICAL PERIODS OF FETAL DEVELOPMENT

  • Phases of Development
    • Pre-embryonic period: little effect or prenatal death
    • Embryonic period: crucial development markers
      • Central nervous system, heart, arms, eyes, legs, teeth, palate, external genitalia, ear
    • Fetal period: characterized by growth and weight gain
      • Full term: 38 weeks
  • Significance
    • Timing of development impacts the risk of major and minor birth defects.

COMPOSITION OF MATERNAL WEIGHT GAIN DURING PREGNANCY

  • Weight Gain Sources
    • Baby: 7.5 lbs
    • Amniotic Fluid: 2 lbs
    • Placenta: 1.5 lbs
    • Uterus: 2 lbs
    • Breasts: 2 lbs
    • Blood: 4 lbs
    • Maternal stores (fat, protein, nutrients): 7 lbs
    • Total weight gain: approximately 22.5 lbs according to ACOG, 5th ed.

LOW-BIRTHWEIGHT NEWBORNS

  • Criteria
    • An infant weighing <5.5 lbs is considered low-birthweight.
  • Risks
    • Increased likelihood of infection, lung problems, learning disabilities, and higher mortality rates.

WEIGHT GAIN DURING PREGNANCY

  • Pre-pregnancy BMI Guidelines
    • Underweight (BMI < 18.5): Recommended weight gain 28-40 lbs
    • Normal Weight (BMI 18.5-24.9): 25-35 lbs
    • Overweight (BMI 25-29.9): 15-25 lbs
    • Obese (BMI ≥ 30): 11-20 lbs

MEETING INCREASED NUTRIENT NEEDS

  • Caloric Needs
    • No increase during the first trimester; after that, increase by ___ calories/day relative to pre-pregnancy requirements.
  • Indicators of Nutrient Sufficiency
    • Hunger and progression of weight gain.

PROTEIN REQUIREMENTS DURING PREGNANCY

  • Increased Requirements
    • Protein needs increase by approximately 25 g per day.
    • Sources of protein include lean meats, poultry, dairy, legumes, and tofu.
    • Caution advised for predatory fish due to mercury content.

CARBOHYDRATE REQUIREMENTS DURING PREGNANCY

  • Energy Source
    • Pregnant women should consume at least 175 g of carbohydrates per day.
    • Fiber helps prevent constipation and hemorrhoids.

FAT REQUIREMENTS DURING PREGNANCY

  • Fat Intake
    • Recommended total fat intake remains unchanged, but focus on increasing essential fatty acids (linoleic and alpha-linolenic acid).

VITAMIN AND MINERAL REQUIREMENTS DURING PREGNANCY

  • Changes in Recommendations
    • Folate: from 400 µg/day to 600 µg/day
    • Iron: from 18 mg/day to 27 mg/day (50% increase)
    • Calcium and Vitamin D recommendations remain unchanged but are critical for fetal and maternal health.

FOLATE REQUIREMENTS

  • Importance
    • Inadequate folate/folic acid can lead to spina bifida, anencephaly, low birthweight, and slow fetal growth.

IRON REQUIREMENTS

  • Increased Needs
    • RDA for iron increases due to the requirement for building red blood cells in the fetus.
    • Iron-deficiency anemia in mothers is linked to premature delivery risks.

CALCIUM REQUIREMENTS

  • Bone Development
    • Calcium is crucial for fetal bone and teeth development, as well as for maintaining the mother’s bone strength.

ZINC REQUIREMENTS

  • Increased Intake
    • Zinc requirements increase by over 30% during pregnancy for DNA and RNA synthesis.

PRENATAL VITAMIN AND MINERAL SUPPLEMENTS

  • Recommendations
    • Essential for women with specific dietary restrictions or at nutritional risk (e.g., vegans, women under 25, those avoiding milk products).

HYDRATION

  • Fluid Needs
    • Increased to support fetal circulation, amniotic fluid, and higher blood volume.
    • Recommendation to increase fluid intake by ___ mL of water per calorie consumed, plus an additional 300 mL above non-pregnancy intake.

FOOD CRAVINGS

  • Nature of Cravings
    • Typically harmless, except for cravings leading to non-food consumption (e.g., pica).
    • Pica can result in maternal iron deficiency and complications for the infant.

GASTROINTESTINAL ISSUES

  • Hormonal Effects
    • Hormones during pregnancy can lead to constipation and hemorrhoids due to muscle relaxation.
  • Heartburn Prevention Tips
    • Smaller meal portions, avoid spicy foods, elevate head during sleep.

COMPLICATIONS DURING PREGNANCY

  • Pre-eclampsia and Eclampsia
    • Characterized by high blood pressure and swelling; untreated can lead to seizures.
  • Gestational Diabetes
    • A rise in blood glucose managed through diet; risks include macrosomia and increased Type 2 diabetes risk for mothers.

CAFFEINE

  • Risks and Recommendations
    • Caffeine can affect fetal heart rate; limit intake to ≤300 mg per day.

ALCOHOL

  • Risks of Consumption
    • No safe alcohol intake is recommended; associated with fetal alcohol syndrome (FAS).

SMOKING

  • Impact on Fetus
    • Reduces blood flow and O2 delivery, leading to risks of miscarriage and low birth weight.

FOOD-BORNE ILLNESS

  • Increased Risks
    • Weakened maternal and fetal immune systems increase vulnerability to pathogens; key risks include Listeria and Toxoplasma.

BREASTFEEDING BENEFITS

  • General Recommendations
    • Breastfeeding is recommended as the preferred method of feeding.
  • Maternal Benefits
    • Facilitates weight loss, strengthens bonding, and reduces cancer risk.
  • Infant Benefits
    • Lower likelihood of allergies, infections, and long-term health issues (e.g., obesity).

BREAST MILK COMPOSITION

  • Comparison to Infant Formula
    • Human milk vs. infant formula: higher protein content in breast milk, diverse nutrient profile beneficial for infant health.

FIRST DAYS OF LIFE - INFANT FEEDING

  • Initial Feeding Recommendations
    • Newborns require frequent small meals; initial milk is high in protein and antibodies (colostrum).

MOTHER'S NEEDS DURING BREASTFEEDING

  • Caloric Needs
    • Increased caloric requirement (640 calories/day above pre-pregnancy for first 6 months).
  • Dietary Composition
    • Increased carbohydrates and protein requirements.

NUTRITIONAL NEEDS OF INFANTS BEYOND MILK

  • Caloric and Nutritional Requirements
    • Infants need 40-50 calories per pound body weight per day; fat should constitute 50-60% of caloric intake.

VITAMINS AND MINERALS BEYOND MILK

  • Essential Nutrients
    • Vitamin K, D, and iron supplementation may be necessary based on breastfeeding status and infant age.

STARTING SOLID FOODS

  • Introduction Guidelines
    • Recommended at around 6 months; solids should complement breast milk.

CHOKING HAZARDS AND RECOMMENDATIONS

  • Foods to Avoid
    • Nuts, grapes, popcorn, and large chunks of raw foods for young children.
  • Bottle-Mouth Syndrome
    • Risk for children going to bed with bottles of milk or juice.