Version June 2024
| Intervention | First trimester | Second trimester | Third trimester |
| Maternal weight/weight gain | Assess maternal pregravid BMI, determine BMI-specific weight gain goals | Assess/counsel regarding maternal BMI-specific weight gain (each prenatal care visit) | Assess/counsel regarding maternal BMI-specific weight gain (each prenatal care visit) |
| Caloric requirements (kcal × kg–1 × d–1) | |||
| Normal BMI | 40 to 45 | Alter as necessary for weight gain goal | Alter as necessary for weight gain goal |
| Underweight | 42 to 50 | ||
| Overweight | 30 to 35 | ||
| Micronutrient supplement (daily total intake) | |||
| MVI with iron (30 mg elemental tablets) | 1 | 2 | 2 |
| Calcium (mg) | 1500 | 2500 | 2500 |
| Vitamin D (international units) | 1000 | 1000 | 1000 |
| Magnesium (mg) | 400 | 800 | 800 |
| Zinc (mg) | 15 | 30 | 30 |
| DHA/EPA (mg) | 300 to 500 | 300 to 500 | 300 to 500 |
| Folic acid (mg) | 1 | 1 | 1 |
| Vitamin C/E (mg/international units) | 500 to 1000/400 | 500 to 1000/400 | 500 to 1000/400 |
| Nutritional consultation | Yes | Repeat if not at weight gain goal, anemia, GDM | Repeat if not at weight gain goal, anemia, GDM |
| Laboratory nutritional assessment | Hemoglobin ferritin folate/B12 early screen for GDM (risk factors) vitamin D | Follow up abnormalities from first trimester | Hemoglobin ferritin GDM screen with or without vitamin D |
| Risk factor-appropriate exercise or reduction in activity | Screen | Screen | Screen |
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