是更年開始的早期表現，很常見，和年齡無關。。。
http://www.webmd.com/menopause/news/20050318/cycle-changes-predict-transition-to-menopause?page=2
Cycle Changes Predict Transition to Menopause
Age Is Poor Predictor continued。。。
While many women experience shorter-than-normal menstrual cycle length early in the transition to menopause, others have cycle lengths that are longer than they normally would be, Freeman says. Cycle length is from the first day of your period to the first day of your period in the next cycle.
As the transition progresses, cycle length tends to get longer and periods are missed.
Some women have heavier periods early in the transition to menopause and others have lighter-than-normal flows.
"Because the transition is gradual over years and does not depend on age alone, it is important to be aware of early bleeding changes to identify women beginning this phase of their lives," Gracia and colleagues wrote.
Renown menopause expert Isaac Schiff, MD, noted that the researchers found large variations in hormone levels among the women in the study, suggesting that hormonal status alone is a poor predictor of menopause status. Schiff is chief of obstetrics and gynecology at Massachusetts General Hospital, and a professor of gynecology at Harvard Medical School in Boston.
"This study verifies that menstrual cycle changes can be used to determine a woman's menopause transition stage," he noted.
打開link看。。。
