Which hormone released from the posterior lobe of the pituitary is known as the labor hormone?

Oxytocin is commonly referred to as the labor hormone because it plays a crucial role during childbirth. This hormone is produced in the hypothalamus and stored in the posterior lobe of the pituitary gland. During labor, oxytocin is released into the bloodstream, stimulating uterine contractions, which help facilitate the delivery of the baby. Furthermore, oxytocin is involved in promoting maternal bonding and milk ejection during breastfeeding, which are vital aspects of postpartum care.

In contrast, the other hormones mentioned do not have a direct role in labor. Antidiuretic hormone (ADH), for instance, primarily regulates water balance in the body by promoting water reabsorption in the kidneys. Growth hormone is responsible for growth and cell reproduction, playing a significant role in maintaining tissues and organs, while thyroid-stimulating hormone regulates thyroid gland activity, impacting metabolism but not directly influencing labor. Thus, among the listed options, oxytocin is unmistakably recognized for its significant influence on the processes of childbirth.