During which time frame does lactogenesis I occur?

Lactogenesis I is characterized by the initial stages of milk production and begins during mid-pregnancy, generally around the second trimester, and continues until about two days postpartum. This phase is crucial because it involves preparing the mammary glands for milk production by developing the necessary structures and hormone environments. During lactogenesis I, colostrum, the first form of milk rich in antibodies and nutrients, is produced, providing essential support to the newborn's immune system in the early days after birth.

Understanding the timeline is critical for healthcare providers, as it informs them about normal physiological processes and how to support mothers in their breastfeeding journey. This knowledge ensures that interventions or support can be offered when it's most effective, especially around the time of birth when mothers are most likely to experience the transition to lactation.