International Board of Certified Lactation Consultant (IBCLC) Practice Exam

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At approximately how many weeks of gestation does the secretion of colostrum begin?

12 weeks
16 weeks
20 weeks
24 weeks

The correct answer is: 16 weeks

Colostrum secretion typically begins around 16 weeks of gestation. This early phase of breast milk production is a crucial part of the reproductive process as colostrum is rich in antibodies and nutrients, which are essential for the newborn's immune system and overall health. During pregnancy, hormonal changes, particularly increased levels of estrogen and progesterone, stimulate the mammary glands, leading to the development of the breast tissue and the initial stages of milk production. It is during this period of approximately 16 weeks that the body begins to prepare for breastfeeding by producing colostrum, which will be essential for the newborn in the first few days of life before the mature milk comes in. Understanding the timeline of colostrum production is important for lactation consultants, as it aids in educating pregnant individuals about what to expect during their breastfeeding journey, fostering confidence, and ensuring they are prepared for the early days postpartum.