What are common changes observed in menstrual cycles during perimenopause?

During perimenopause, which is the transitional phase leading up to menopause, a woman commonly experiences irregular periods and changes in flow. This phase is characterized by fluctuations in hormone levels, particularly estrogen and progesterone, which can lead to a variety of menstrual changes.

Irregular periods are expected, as the body is undergoing a natural aging process and ovulation becomes less predictable. Some cycles may be shorter, while others may be longer, and the flow can vary from lighter to heavier with menstrual cycles. These irregularities can be attributed to the body's adjustment to declining hormone levels, which affects the regularity of the menstrual cycle.

Understanding that consistent and increased regularity, as well as longer luteal phases, are not typical during perimenopause helps clarify why the answer focuses on irregularities. In a normal menstrual cycle, the luteal phase is generally consistent; however, during perimenopause, the unpredictability in timing contributes to the overall irregularity of menstrual cycles.