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.
Once you have spent a year without menstruating, you have officially entered into menopause. Many of the symptoms from perimenopause, women may experience during menopause. These include: hot flashes, night sweats, irregular periods, and loss of libido; these symptoms occur as a result of lowered hormonal production. In other words, though hormone levels are no longer fluctuating drastically, they are overall lower than during premenopause.