A new study has revealed that it is common to experience extended and heavy menstrual bleeding during menopause. Menstrual periods are highly predictable for most women in their 30s. The beginning of menopausal transition of women in their 40s leads to change their menstrual periods dramatically, affirmed the study.

These dramatic changes are likely to spark a feeling of uncertainty and worry among women for their health as they find it difficult to answer if everything with them is all right, said study author Sioban Harlow, a University of Michigan professor of epidemiology.

Harlow said that their study will reassure women that there is nothing to worry about, as it is normal. Menopause is a condition that occurs when a woman's ovaries stop producing the hormones estrogen and progesterone. The normal age for the occurrence of menopause is after 45 years.

"Women need more descriptive information about the bleeding changes they can expect. We need clear guidance to help women understand what changes in bleeding patterns do and do not require medical attention", she added.

The study involved 1,300 American women, aged 42 to 52. The researchers found bleeding was experienced by 91% of the study participants for 10 or more days. Also, 88% reported bleeding for six or more days and over 75% reported heavy bleeding for three or more days during menopause.

The latest study involved women who were White, Black, Chinese and Japanese. All the women belonged to Michigan, Los Angeles and northern California. The recent study has transcended the limitations of previous studies in which only white women were considered.

Dr. John Randolph Jr., a U-M professor of obstetrics and gynecology, has welcomed the findings of the study, saying this paper will be helpful to both clinical and investigational professionals. The findings are a kind of reassurance for women that changes in bleeding patterns during menopause are normal.