Nano is a prefix meaning extremely small.. When quantifiable, it translates to one-billionth, as in the nanosecond. Nano comes from the Greek word nanos, meaning dwarf..ano is a prefix meaning extremely small.. When quantifiable, it translates to one-billionth, as in the nanosecond. Nano comes from the Greek word nanos, meaning dwarf..
Aug. 19, 2003 -- Obese women may be more likely to develop breast cancer largely because their bodies produce more estrogen than thin women do. New research suggests that the increase in breast cancer risk faced by obese postmenopausal women may largely be due to higher levels of estrogens circulating in their bodies.
Side Effects. Women rarely have severe side effects from taking estrogens to replace estrogen. The prolonged use of estrogens has been reported to increase the risk of endometrial cancer (cancer of the lining of the uterus) in women after menopause. This risk seems to increase as the dose and the length of use increase.