Weight loss greater than what percentage of birth weight should prompt further investigation?

• A. 5%
• B. 7%
• C. 8%
• D. 10%

Answer: (D)

Newborn weight loss in the first days is common as fluids shift and intake may lag behind. A typical amount is about 5–7% of birth weight by the second to third day. When weight loss exceeds 10% of birth weight, it signals the need for further assessment to rule out inadequate intake, dehydration, or other issues affecting fluid balance.

In practice, this means examining feeding effectiveness—how often and how long the baby feeds, latch technique, and whether milk transfer is adequate. Check diaper output, ensure the baby is staying hydrated (look for signs like moist mucous membranes, normal skin turgor, and appropriate urine output), and watch for any warning signs such as lethargy, a sunken fontanelle, or poor perfusion. If the weight loss is at or beyond 10%, a thorough evaluation and possible lactation support or medical assessment are important to ensure the infant’s needs are met.