International Board of Certified Lactation Consultant (IBCLC) Practice Exam

When does a parent’s bone density return to baseline after lactation?

1. Immediately after breastfeeding

2. After weaning

3. Within six months postpartum

4. After one year of breastfeeding

The correct answer is: After weaning

The return of a parent's bone density to baseline after lactation is generally observed to occur after weaning. During lactation, the body undergoes various physiological changes, including changes in calcium metabolism, which can lead to a temporary decrease in bone density. This is a natural response, as the body directs calcium to the breast milk to support the developing infant. Once the breastfeeding period ends and weaning occurs, the mother's body begins to restore the calcium balance and bone density typically starts to recover. The mechanism of bone remodeling, which includes the resorption of old bone and formation of new bone, is activated, and any reductions in bone mineral density from lactation can be reversed. While other options may suggest different timelines or stages in relation to breastfeeding or postpartum recovery, the process of bone density returning to its baseline level is closely tied to the end of nursing, making the timing of weaning the critical factor in this recovery process.