other factors that shift demand curves income is not the only factor that causes a shift in demand other things that change demand include tastes and preferences the composition or size of the population the prices of related goods and even expectations
Causes of Early Menopause. Like in menopause that happens later in life, hormonal fluctuations are one of the root causes of early menopause. However, it is not fully known why these hormonal fluctuations are triggered earlier for some women.
Symptoms. The most common symptoms of perimenopause are hot flashes and menstrual irregularities, but it isn't unusual to experience other precursors to menopause. Women can suffer periodic sleep disruptions, mood swings and urinary problems throughout perimenopause, according to the National Institutes of Health.