The greater the visual impairment, the higher the melatonin level, the lower the estrogen levels and the lower the risk. Working night shifts or being exposed to low frequency electromagnetic radiation both suppress melatonin levels and unsurprisingly, increase breast cancer rates.
Roadmap to retirement: When your employer or plan changes. A private retirement plan can change its rules or terminate at any time. These changes can occur for a variety of reasons: during company mergers, to streamline plan administration, to improve plan features, or to reduce costs.
Main article: History of retirement. Retirement, or the practice of leaving one's job or ceasing to work after reaching a certain age, has been around since around the 18th century. Prior to the 18th century, the average life expectancy of people was between 26 and 40 years.