a segment of DNA that can move from one place to another in a cell's genome or between a bacterial cell and a plasmid or virus. Viruses may even carry a transposon from one bacterium to another. Also called jumping gene, transposable element. segment of DNA that can move from one place to another in a cell's genome or between a bacterial cell and a plasmid or virus. Viruses may even carry a transposon from one bacterium to another. Also called jumping gene, transposable element.
Women with a low body weight, are frequently under high stress, or in perimenopause tend to have irregular periods. These women have very low estrogen production, so the body has trouble communicating to the ovaries that eggs need to be released, and ovulation does not take place.
This phase presents similar symptoms to menopause that gradually increase, including fatigue, irritability, mood swings, and weight gain. The difference is that women in perimenopause continue to have periods, although they may be irregular. When you do not have a period for 12 months, you have entered menopause. Early menopause occurs in women between the ages of 40 and 45, and occurs naturally, in other words, is not medically or surgically initiated.