Which of these is a pituitary hormone that stimulates uterine contractions and milk ejection?

The hormone you’re looking for is oxytocin. Oxytocin is produced in the hypothalamus and secreted by the posterior pituitary gland. It plays a crucial role in childbirth and lactation. During labor, oxytocin stimulates uterine contractions, which are essential for the delivery of the baby. It prompts the smooth muscles of the uterus to contract, facilitating the process of labor. Additionally, after the baby is born, oxytocin helps eject milk from the mammary glands during breastfeeding by causing the milk ducts to contract and release milk. This dual function makes oxytocin vital for reproductive health and maternal bonding.