Certified Breastfeeding Counselor (CBC) Practice Exam 2025 - Free CBC Practice Questions and Study Guide.

Lactogenesis 1 is the first stage of breast milk production in pregnant women, which typically begins towards the end of the second trimester around 16 weeks. Option A is incorrect because 8-12 weeks is during the first trimester and lactogenesis 1 does not occur until later in the pregnancy. Option B is incorrect because 13-16 weeks is also during the first trimester and may be too early for lactogenesis 1 to occur. Option D is incorrect because 20-24 weeks is during the second trimester and lactogenesis 1 typically occurs towards the end of the second trimester. Therefore, option C is the most accurate answer.