International Board of Certified Lactation Consultant (IBCLC) Practice Exam

When does lactogenesis II typically commence after childbirth?

1. Within 24 hours postpartum

2. Between 30 to 72 hours postpartum

3. After 72 hours postpartum

4. At birth

The correct answer is: Between 30 to 72 hours postpartum

Lactogenesis II typically commences between 30 to 72 hours postpartum. This phase is a critical transition in the process of milk production. After giving birth, the body undergoes hormonal changes that trigger the production of mature milk. The onset of lactogenesis II is characterized by an increase in milk volume and the transition from colostrum, which is the first milk produced, to mature milk, which usually occurs within this time frame. During this period, the mother’s body responds to the hormonal signals from the placenta’s separation and the decreased levels of pregnancy hormones. It is essential for the establishment of a successful breastfeeding relationship, as the baby needs to effectively remove milk from the breast to stimulate milk production. Understanding this timeline is crucial for lactation consultants and healthcare providers supporting new mothers, as they can offer reassurance and guidance during a pivotal time for both mother and infant.