Which describes the typical pattern of breast milk production after birth?

• A. Colostrum initially, then transition to mature milk by day 3-5; milk supply responds to infant demand.
• B. Milk production begins at week 2 and formula supplementation is often needed.
• C. Colostrum is produced for six weeks and mature milk never forms.
• D. Milk supply is fixed and does not respond to infant demand.

Answer: (A)

Postpartum lactation follows a specific pattern: the breasts produce colostrum in the first days after birth, then transition to mature milk by about day 3 to 5. After that, the milk supply adjusts based on how often and effectively the infant nurses—the more demand there is, the more milk is produced. This supply-and-demand mechanism is why frequent feeding helps establish and maintain an adequate milk supply.

The described sequence—colostrum initially, transition to mature milk by day 3–5, and milk production that responds to infant demand—best matches how lactation naturally develops after birth. Other scenarios, like starting production only around week 2 with routine formula supplementation, colostrum lasting six weeks with no mature milk, or a fixed supply that doesn’t respond to feeding, don’t align with how breast milk production works.