Nutrient

Postpartum

Nursing

Pregnancy

Calcium

1,000 mg/day

1,000 mg/day

1,000 mg/day

Folate

400 mcg/day

500 mcg/day

600 mcg/day

Iron

18 mg/day

9 mg/day*

27 mg/day

Protein

46 g/day

71 g/day

71 g/day

Vitamin B6

1.3 mg/day

2.0 mg/day

1.9 mg/day

Vitamin B12

2.4 mcg/day

2.8 mcg/day

2.6 mcg/day

Vitamin C

75 mg/day

120 mg/day

85 mg/day

*Until menstruation resumes, at which point needs return to 18 mg/day.

Source: National Academy of Sciences Institute of Medicine.