What physiological role does oxytocin play in pigs?

Oxytocin plays a crucial role in reproductive physiology, particularly in the context of parturition (the process of giving birth) and lactation (milk production). In pigs, when a sow is ready to give birth, oxytocin is released, which stimulates uterine contractions necessary for delivering the piglets. This hormonal trigger is essential for the timing and progression of labor.

Additionally, oxytocin is vital for the milk let-down reflex, allowing the sow to release milk in response to her piglets' suckling. This mechanism ensures that the piglets can access the nourishment they need for healthy growth and development immediately after birth.

While oxytocin is involved in various other physiological processes, including bonding and social behaviors, its most significant and well-documented functions in pigs are related to parturition and the facilitation of nursing. This underscores the importance of oxytocin in the reproductive health and offspring survival in swine.