"Fluctuating hormones" means that the levels of certain chemicals in our bodies that affect how we feel and function can go up and down. This can cause changes in emotions, energy levels, and other bodily functions. Full definition
Joint pain is an unexplained soreness in muscles and joints, which is unrelated to trauma or exercise, but may be related to the effects of fluctuating hormone levels on the immune system. (34-menopause-symptoms.com)
Menopausal weight gain is one of the many symptoms of fluctuating hormone levels in the body. (consumerhealthdigest.com)
Even if this isn't the case, your body will be dealing with fluctuating hormone levels as well as being sleep - deprived. (bounty.com)