The nurse is assessing a 6-month-old healthy infant who weighed 7 pounds at birth. The nurse should expect the infant to now weigh approximately how many pounds?

Correct Answer: B

Rationale: The correct answer is B because birth weight typically doubles around age 5 to 6 months. Therefore, a 6-month-old infant who weighed 7 pounds at birth would be expected to weigh around 15 pounds at this age.

Correct Answer: D

Rationale: The overall incidence of multifetal gestation has increased due to assisted reproductive technologies. The other statements are true regarding multiple gestation pregnancies.

Correct Answer: C

Rationale: The anion gap is calculated as (Na⁺ - [Cl⁻ + HCO₃⁻]) and represents unmeasured anions in plasma. It helps differentiate metabolic acidosis causes, with high values suggesting lactic acidosis or toxin ingestion.

Correct Answer: B

Rationale: The correct answer is B because birth weight typically doubles around age 5 to 6 months. Therefore, a 6-month-old infant who weighed 7 pounds at birth would be expected to weigh around 15 pounds at this age.

Correct Answer: D

Rationale: Adolescent girls are more likely to develop somatoform disorders due to hormonal changes, social pressures, and psychological factors during adolescence.