Irregular Periods
During perimenopause, your ovaries start running low on eggs and slow down. This causes erratic fluctuations in your key hormones—estrogen and progesterone—which can in turn disrupt your cycle.
Your periods may become irregular, heavier or lighter, shorter or longer, or sometimes skip altogether. It also means that some months you may ovulate, other months you may not—and occasionally, you might even ovulate twice in one cycle.