High body mass index is an indicator of obesity and fatness. A body mass index of 31 is very high and this indicates that Jane is highly obese and over-weight. Jane might have osteoarthritis. The doctor should advise her to get her Vitamin D, Calcium, Creatinine, and joint aspiration, along with an MRI/CT scan of the joint.
Yes, this is correct!
The reproductive system in humans does not have any other function for sustainable of the life of the individual -only for the creation of new life and the survival of the species! I would maybe only add that it also has a function of supporting this life in the first months.