Lactation

**Definition:** The processes of milk secretion by the maternal MAMMARY GLANDS after PARTURITION. The proliferation of the mammary glandular tissue, milk synthesis, and milk expulsion or let down are regulated by the interactions of several hormones including ESTRADIOL; PROGESTERONE; PROLACTIN; and OXYTOCIN.

**Tree numbers:** - G08.686.523 - G08.686.702.500

**Synonyms:** - Milk Secretion