the executive power of the federal government is vested in the president. the president has the power to appoint ambassadors, members of the Cabinet, Justices of the Supreme Court and Judges of the lower Federal Courts.
Image: Film Magic/Film Magic/Getty. Stress is the most common cause of irregular periods. Cortisol, the stress hormone, has a direct impact on how much estrogen and progesterone, two sex hormones, gets produced by the body. If you have too much cortisol in your bloodstream, the time and flow of your cycle could change.
This is why women naturally go through menopause and stop having their periods after their normal reproductive years. For many women who are of reproductive age, low estrogen can cause missed or irregular periods. In fact, amenorrhea in young women is one of the best clinical indicators for estrogen deficiency.