Scientists have long known that lower estrogen levels after menopause can cause fat storage to shift from the hips and thighs to the abdomen. Now, a groundbreaking study, co-authored by the Mayo Clinic, has determined why: Proteins, revved up by the estrogen drop, cause fat cells to store more fat.
Medical School. In order to become a doctor, a person must first complete a bachelor's degree. Then, he or she must attend and complete four years of medical school. The first two years of medical school are comprised mostly of classroom work, learning the basics of anatomy, diseases and body functions.
How many years of college does it take to be a doctor? It usually takes somewhere between 11 and 16 years to become a practicing M.D. After four years at an accredited college and four years at a medical school, a doctor must complete a residency of three or more years.