International Board of Certified Lactation Consultant (IBCLC) Practice Exam

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How does bone density change during lactation?

Increases
Decreases
Remains unchanged
Fluctuates

The correct answer is: Decreases

During lactation, bone density typically decreases. This phenomenon occurs because lactating women experience a shift in calcium metabolism to support milk production. During breastfeeding, the body prioritizes calcium availability for the milk, which can lead to a temporary loss of calcium from the bones. The decrease in bone density can be influenced by factors such as the duration of lactation, maternal diet, and overall nutritional status. While the body is capable of replenishing bone density after weaning due to restored hormonal balance and dietary calcium intake, the immediate effect of lactation is a reduction in bone density. In summary, the decrease in bone density during lactation is a physiological adaptation to ensure adequate calcium supply for breastfeeding, highlighting the complex interplay between maternal health and infant nutrition during this critical period.