Which hormone is not involved in the milk production process?

Relaxin is not involved in the milk production process. This hormone’s primary role is related to pregnancy and childbirth, specifically in the relaxation of the pelvic muscles and the cervix to prepare for labor. While it also plays a role in remodeling connective tissues during pregnancy, it does not have a direct function in lactation.

In contrast, prolactin is critical for milk production as it stimulates the mammary glands to produce milk after childbirth. Oxytocin is also important in this context, as it is responsible for the milk ejection reflex, aiding in the release of milk during breastfeeding. Estrogen, although not directly involved in producing milk, plays a significant role in preparing the breast tissue for lactation during pregnancy. Thus, while multiple hormones are interrelated in the broader context of reproduction and lactation, relaxin’s specific functions do not pertain to milk production.