Agalactia, the inability to produce milk, is a condition that affects many mammals after giving birth. There are several synonyms for this term, including lactation failure, milk inadequacy, and milklessness. Other words that may be used in place of agalactia include hypogalactia, low milk production, and deficiency of milk secretion. Although most commonly used in reference to lactating animals, these terms may also apply to women who struggle with breastfeeding. It is important for individuals with agalactia to seek medical attention in order to treat the underlying cause and improve lactation if possible.