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.
During the typical childbearing years of 18 to 35, signs of pregnancy are often obvious and indicate conception. The perimenopause period, however, which occurs during the two to eight years leading to menopause, can produce issues that are similar to pregnancy symptoms. As you go through your perimenopause years, you will be more inclined to wonder which condition is causing your current symptoms.