Key Treatment

Iron (30 mg/day) is recommended in the second and third trimesters (SOR: A).

Folic acid (400 pg/day) is recommended in the preconception period and first trimester (SOR: A).

Table 21-3 Recommended Dietary Allowances for Women

Nonpregnant (15-50 yr)

Pregnant (Singleton)

Lactating (first 6 mo)

Energy, kcal

1900-2200

+300

+500

Protein, g

44-50

60

ßg RE

800

800

ßg*

5-10

10

10

Vitamin E, mg TE

8

10

12

Vitamin K, ßg

55-65

65

65

Vitamin C, mg

60

70

95

Thiamin, mg

1.1

1.5

1.6

Riboflavin, mg

1.3

1.6

1.8

Niacin, mg NE

15

17

20

Vitamin B6, mg

1.5-1.6

2.2

2.1

Folate, ßg

400

400

ßg

2.0

2.2

2.6

Calcium, mg

800-1200

1200

1200

Phosphorus, mg

800-1200

1200

1200

Magnesium, mg

280

300

355

Iron, mg

15

30

15

Zinc, mg

12

15

19

Iodine, ßg

150

175

200

Selenium, ßg

50-55

65

75

Data from Report of the Subcommittee on the Tenth Edition of the RDAs, Recommended Dietary Allowances, National Academy of Sciences, with modifications from ACOG Committee Opinion #196, 1998; and CDC. Use of folic acid for the prevention of spina bifida and other neural tube defects, MMWR 1991;40:513-516. *As cholecalciferol.

RE, Retinal equivalents; TE, alpha-tocopherol equivalents; NE, niacin equivalents.

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