What Hormone Prepares Mammary Glands For Lactation?

What Hormone Prepares Mammary Glands For Lactation? Although numerous hormones are involved in the lactational process, prolactin is the key hormone controlling milk synthesis. During lactation, the infant’s suckling at the breast leads to the generation of nerve signals that are transmitted by sensory nerves to the hypothalamus in the brain. What stimulates the mammary