RDN Lifecycle Nutrition 2

Question 1

A pregnant woman at 28 weeks gestation reports consuming no fish or seafood. Which nutrient is she most likely deficient in that is critical for fetal brain development?

Accepted Answer

DHA (docosahexaenoic acid)

Answer

DHA, an omega-3 fatty acid found primarily in fatty fish, is essential for fetal brain and retinal development during the third trimester.

Question 2

Which of the following best describes the recommended weight gain for a woman with a pre-pregnancy BMI of 17.5 kg/m²?

Accepted Answer

12.5–18 kg (28–40 lbs)

Answer

Women who are underweight (BMI <18.5) are advised to gain 12.5–18 kg (28–40 lbs) during a singleton pregnancy per IOM guidelines.

Question 3

A breastfeeding mother asks about her iodine needs. Compared to her pre-pregnancy requirement of 150 mcg/day, what is the RDA during lactation?

Accepted Answer

290 mcg/day

Answer

The iodine RDA increases to 290 mcg/day during lactation to support adequate secretion of iodine in breast milk for infant thyroid function.

Question 4

An 8-month-old infant is introduced to pureed meat. What is the PRIMARY nutritional reason for introducing meat at this age?

Accepted Answer

Iron to replace declining fetal iron stores

Answer

Fetal iron stores are largely depleted by 4–6 months, making iron-rich complementary foods like pureed meat critical to prevent iron-deficiency anemia.

Question 5

Which feeding pattern is associated with the greatest risk of dental caries in toddlers?

Accepted Answer

Allowing a bottle of juice or milk at bedtime

Answer

Prolonged exposure to fermentable carbohydrates from a bedtime bottle of juice or milk causes early childhood caries (baby bottle tooth decay).

(RDN) Registered Dietitian Nutritionist Practice Test

(RDN) Registered Dietitian Nutritionist Practice Test

RDN Lifecycle Nutrition 2