Define the term 'lactation categories' in pharmacology.

The term 'lactation categories' in pharmacology refers to the classification of medications based on their safety for breastfeeding mothers and infants. This classification is critical for healthcare providers, particularly midwives, to ensure that medications prescribed do not adversely affect the nursing mother or her child.

These categories help inform the decision-making process regarding whether certain medications can be safely used during lactation, taking into account factors such as the potential for drug transfer into breast milk and the known effects or risks to the infant. It provides guidelines that are essential for promoting maternal and infant health while managing medical conditions.

The other options do not align with the definition of lactation categories in pharmacology; they either narrow the focus incorrectly to supplements, food safety, or unrelated issues regarding lactose-free drugs.